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✅Have + past participle

 (‘have done’, ‘have been’ have stolen’ etc.) is called the perfect infinitive.

📘When we use modal verbs to talk about the present they are followed by an infinitive without ‘to’.

📕When we use modal verbs to talk about the past they are followed by a perfect infinitive.


@LearnbyEnglishlearners


✅must + perfect infinitive

📕We use must + perfect infinitive when we feel sure about something in the past.

✅You must have been delighted when you heard you’d won the lottery.

📕The thieves must have come in through the window. Look – it’s still open.

📘Oh no! Where’s my car? Someone must have stolen it.

@LearnbyEnglishlearners

✅might/may/could + perfect infinitive .


✅We use might, may or could with the perfect infinitive to say that we think something was possible but we aren’t sure.

✅The thieves might have escaped by car but we can’t be sure.

✅He should be here by now. He may have been delayed by a traffic jam or something.


📕I can’t find my purse. I could have left it in the supermarket but I just don’t know.


@LearnbyEnglishlearners


✅can’t + perfect infinitive.

📕We use can’t + perfect infinitive when we feel sure something didn’t happen in the past.

✅I thought I saw John in town this morning but it can’t have been him – he’s in Greece this week.

✅I can’t have left it in the supermarket – I had it on the bus on the way home.


✅You can’t have read the instructions properly. They’re perfectly clear.


@LearnbyEnglishlearners
#grammar
#modal_perfect

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1.01K viewsAug 22 at 10:21

@LearnbyEnglishlearners

✅Have + past participle

 (‘have done’, ‘have been’ have stolen’ etc.) is called the perfect infinitive.

📘When we use modal verbs to talk about the present they are followed by an infinitive without ‘to’.

📕When we use modal verbs to talk about the past they are followed by a perfect infinitive.


@LearnbyEnglishlearners


✅must + perfect infinitive

📕We use must + perfect infinitive when we feel sure about something in the past.

✅You must have been delighted when you heard you’d won the lottery.

📕The thieves must have come in through the window. Look – it’s still open.

📘Oh no! Where’s my car? Someone must have stolen it.

@LearnbyEnglishlearners

✅might/may/could + perfect infinitive .


✅We use might, may or could with the perfect infinitive to say that we think something was possible but we aren’t sure.

✅The thieves might have escaped by car but we can’t be sure.

✅He should be here by now. He may have been delayed by a traffic jam or something.


📕I can’t find my purse. I could have left it in the supermarket but I just don’t know.


@LearnbyEnglishlearners


✅can’t + perfect infinitive.

📕We use can’t + perfect infinitive when we feel sure something didn’t happen in the past.

✅I thought I saw John in town this morning but it can’t have been him – he’s in Greece this week.

✅I can’t have left it in the supermarket – I had it on the bus on the way home.


✅You can’t have read the instructions properly. They’re perfectly clear.


@LearnbyEnglishlearners
#grammar
#modal_perfect

BY English learners