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Exercise 1
Choose the correct verb form, Past Simple or Present Perfect, to complete each sentence.
Example: She _____ her homework an hour ago. (finished / has finished)
Answer: She finished her homework an hour ago.

Past Simple and Present Perfect
In English, we use different verb tenses to talk about things that happened in the past. Two very important tenses are the past simple and the present perfect. They can look similar, but we use them in different situations.
Look at these two sentences:
"I visited Paris last year." → Past Simple
"I have visited Paris." → Present Perfect
Both sentences talk about the past, but they give us different information. In this lesson, you will learn when to use each tense, how to form them, and why they are different.
What Is the Past Simple?
We use the past simple to talk about something that happened at a specific time in the past. The action is finished. We know when it happened.
Think of your friend Maria. She says:
"I watched a film yesterday."
"We moved to London in 2015."
"He called me this morning."
Notice that these sentences all have a time word or phrase that tells us exactly when something happened. Words like yesterday, last week, in 2010, this morning, and ago are very common in past simple sentences.
How to Form the Past Simple
To make the past simple, we usually add -ed to the verb. These are called regular verbs.
| Base Form | Past Simple | Example Sentence |
|---|---|---|
| walk | walked | She walked to school yesterday. |
| watch | watched | We watched a film last night. |
| visit | visited | They visited their grandparents last Sunday. |
| play | played | He played football on Saturday. |
| work | worked | I worked in a café two years ago. |
However, many common verbs are irregular. This means they do not follow the -ed rule. You need to learn these separately.
| Base Form | Past Simple | Example Sentence |
|---|---|---|
| go | went | I went to the supermarket yesterday. |
| eat | ate | She ate pizza for lunch. |
| see | saw | We saw a great film last weekend. |
| buy | bought | He bought a new jacket. |
| have | had | They had a party last Friday. |
| come | came | She came home late yesterday. |
Past Simple: Positive, Negative, and Question Forms
Here is how we build past simple sentences. The word subject means the person or thing doing the action (I, you, he, she, it, we, they).
| Form | Structure | Example |
|---|---|---|
| Positive | Subject + past verb | She visited Rome last summer. |
| Negative | Subject + did not (didn't) + base verb | She didn't visit Paris. |
| Question | Did + subject + base verb? | Did she visit Rome? |
Important: In negative and question forms, we use did / didn't + the base form of the verb (not the past form).
❌ She didn't visited Rome.
✅ She didn't visit Rome.
❌ Did she visited Rome?
✅ Did she visit Rome?
What Is the Present Perfect?
We use the present perfect to talk about something that happened in the past but is connected to now. We do not say exactly when it happened. The result or experience is what matters.
Think of your friend James. He says:
"I have visited Paris." → He is talking about his life experience. We do not know when he went.
"She has lost her keys." → She lost them in the past, but the problem exists now — she still cannot find them.
"They have finished the homework." → The homework is done now. The result is important.
How to Form the Present Perfect
To make the present perfect, we use:
Subject + have / has + past participle
The past participle is the third form of a verb. For regular verbs, it is the same as the past simple (-ed form). For irregular verbs, you need to learn the third form.
| Subject | have / has | Past Participle | Example |
|---|---|---|---|
| I | have | visited | I have visited London. |
| You | have | seen | You have seen this film before. |
| He / She / It | has | eaten | She has eaten already. |
| We | have | finished | We have finished the exercise. |
| They | have | gone | They have gone to the shops. |
Note: We use have with I, you, we, they. We use has with he, she, it.
Common Irregular Past Participles
| Base Form | Past Simple | Past Participle |
|---|---|---|
| go | went | gone |
| eat | ate | eaten |
| see | saw | seen |
| buy | bought | bought |
| have | had | had |
| write | wrote | written |
| speak | spoke | spoken |
| come | came | come |
| take | took | taken |
Present Perfect: Positive, Negative, and Question Forms
| Form | Structure | Example |
|---|---|---|
| Positive | Subject + have/has + past participle | I have seen that film. |
| Negative | Subject + have/has + not + past participle | I haven't seen that film. |
| Question | Have/Has + subject + past participle? | Have you seen that film? |
Contractions in the Present Perfect
In spoken English and informal writing, we often use contractions (short forms) with the present perfect.
| Full Form | Contraction | Example |
|---|---|---|
| I have | I've | I've finished my homework. |
| You have | You've | You've seen this before. |
| He has | He's | He's eaten lunch already. |
| She has | She's | She's bought a new bag. |
| We have | We've | We've been to Spain. |
| They have | They've | They've lived here for years. |
| have not | haven't | I haven't finished yet. |
| has not | hasn't | She hasn't called me. |
Important Differences: Past Simple vs Present Perfect
This is the most important part of this lesson. Both tenses talk about the past, but they are used in very different situations.
1. Specific Time vs No Specific Time
Use the past simple when you say exactly when something happened.
Use the present perfect when you do not say exactly when.
| Past Simple (specific time) | Present Perfect (no specific time) |
|---|---|
| I saw that film last Friday. | I have seen that film. |
| She visited Japan in 2019. | She has visited Japan. |
| They moved house two years ago. | They have moved house. |
2. Finished Actions vs Results That Connect to Now
Use the past simple when the action is completely finished and does not connect to the present.
Use the present perfect when the result of a past action is still important now.
"I lost my wallet yesterday." → Past simple. It happened yesterday. (We focus on the event.)
"I've lost my wallet!" → Present perfect. I still don't have it. The situation affects the present.
3. Life Experiences
We use the present perfect to talk about things we have or have not done in our life — without saying exactly when.
"Have you ever eaten sushi?"
"Yes, I have. I tried it in Japan." → Notice: the first sentence uses the present perfect (no specific time), but the answer gives a specific detail using the past simple.
Key Time Words for Each Tense
| Past Simple Time Words | Present Perfect Time Words |
|---|---|
| yesterday | already |
| last week / last year / last Monday | yet |
| two days ago / a year ago | just |
| in 2010 / in July / in the morning | ever / never |
| this morning (if the morning is finished) | recently / lately |
| when I was young | for / since |
Using "just", "already", "yet", "ever", and "never"
These words are very common with the present perfect. Here is what they mean:
just = a very short time ago
"I've just arrived home."
already = before now, sooner than expected (positive sentences)
"She has already finished her work."
yet = until now (used in negatives and questions)
"I haven't eaten yet."
"Have you called her yet?"
ever = at any time in your life (used in questions)
"Have you ever been to Australia?"
never = at no time in your life (negative meaning)
"I have never tried skydiving."
Using "for" and "since"
We use for and since with the present perfect to talk about how long something has continued until now.
for = a period of time (a duration)
"I have lived here for three years."
since = from a point in time until now
"I have lived here since 2021."
| for + period of time | since + point in time |
|---|---|
| for two hours | since 9 o'clock |
| for a week | since Monday |
| for six months | since June |
| for ten years | since 2014 |
| for a long time | since I was a child |
Past Simple and Present Perfect Together
Sometimes we use both tenses in the same conversation. We often start with the present perfect (to introduce a topic) and then use the past simple (to give details).
A: "Have you ever been to Italy?" (present perfect — life experience)
B: "Yes, I have. I went to Rome two years ago. I loved it!" (past simple — specific time and details)
This is very natural in everyday English conversation.
Common Mistakes
❌ I have seen her yesterday.
✅ I saw her yesterday. (Use past simple with "yesterday" — a specific time.)
❌ Did you ever visit Paris?
✅ Have you ever visited Paris? (Use present perfect with "ever" for life experiences.)
❌ She has gone to the party last night.
✅ She went to the party last night. (Use past simple with "last night" — a specific time.)
❌ I have finished my work two hours ago.
✅ I finished my work two hours ago. (Use past simple with "ago".)
❌ He has lived here since three years.
✅ He has lived here for three years. (Use "for" with a period of time, not "since".)
❌ Have you seen him yesterday?
✅ Did you see him yesterday? (Use past simple with "yesterday".)
❌ I didn't went to school today.
✅ I didn't go to school today. (Use the base form after "didn't", not the past form.)
❌ She haven't called me yet.
✅ She hasn't called me yet. (Use "hasn't" with he/she/it, not "haven't".)
Past Simple and Present Perfect: Quick Summary
Here is a quick reminder of everything you have learned in this lesson.
| Past Simple | Present Perfect | |
|---|---|---|
| Use | Finished action at a specific time | Past action connected to now, or life experience |
| Form (positive) | Subject + past verb (regular: -ed) | Subject + have/has + past participle |
| Form (negative) | Subject + didn't + base verb | Subject + haven't/hasn't + past participle |
| Form (question) | Did + subject + base verb? | Have/Has + subject + past participle? |
| Key time words | yesterday, last week, ago, in 2010 | just, already, yet, ever, never, for, since, recently |
| Example | I visited Spain last summer. | I have visited Spain. |
Now practise past simple and present perfect in the exercises below.
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