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Unit 35. be/have/do in Present and Past tenses

Present Continuous and Past Continuous
am/is/are -ing
Present Continuous
see Unit 3,
see Unit 4,
see Unit 21
- Please be quiet. I'm working.
- It isn't raining at the moment.
- What are you doing this evening?
was/were -ing
Past Continuous
see Unit 12
- I was working when she arrived.
- It wasn't raining, so we went out.
- What were you doing at 3 o'clock?
Passive
am/is/are + Past Participle
Present Passive
see Unit 20
- The room is cleaned every day.
- I am never invited to parties.
- Oranges are imported into Britain.
was/were + Past Participle
Past Passive
see Unit 20
- I was working when she arrived.
- It wasn't raining, so we went out.
- What were you doing at 3 o'clock?
Present Perfect
have/has + Past Participle
Present Perfect
see Unit 15,
see Unit 16,
see Unit 17
- I have cleaned my room.
- Tom has lost his passport.
- Barbara hasn't been to Canada.
- Where have they gone?
Present Simple and Past Simple - negatives and questions
do/does + Infinitive
Present Simple negatives and questions
see Unit 6,
see Unit 7
- I like coffee but I don't like tea.
- Tom doesn't smoke.
- What do you usually do at weekends?
- Does Barbara live alone?
did + Infinitive
Past Simple negatives and questions
see Unit 10
- I didn't watch TV yesterday.
- It didn't rain last week.
- What time did Barbara go out?
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