Quick Answer: Is Must Have Past Tense?

Can have done grammar?

‘Can have done’ is illogical.

If I did it, I know I did, and if it didn’t, then the only thing I can say (present tense) is I COULD HAVE done it.

You cannot mix the present tense (“can”) with the perfect tense (“have done”)..

Should it have been?

Use “should have been” to express what you think should have happened, but did not happen. Often, you’ll hear this phrase used in arguments or regrets about the past. For example: “You should not have lied to me!”

What are the 3 types of infinitives?

In English, when we talk about the infinitive we are usually referring to the present infinitive, which is the most common. There are, however, four other forms of the infinititive: the perfect infinitive, the perfect continuous infinitive, the continuous infinitive, & the passive infinitive.

What is the perfect infinitive in French?

The perfect or past infinitive refers to something that has happened in the past and it is formed using avoir or être (in their infinitive form) with a past participle. It is used commonly with après to indicate a past event.

Where we use must have?

We use “must have”, “can’t have” and “might have” in the same way as the present perfect – the action we are describing happened, or did not happen, in the past and is still true in the present. “must have”: we believe the action definitely happened. “She must have left the house by now; it’s nearly 11 o’clock.”

Can we use must in past tense?

“Must” IS the past tense of must. Also used in conjunction with “needs,” as in “he must needs attack before he be defeated.”

What is a perfect infinitive?

The perfect infinitive has the following structure: (to) have + past participle. Examples are: to have missed, to have written, to have worked, to have left etc. Perfect infinitives can have the same kind of meaning as perfect or past tenses. • I am glad to have found a new job.

Where do we use might?

MIGHT HAVE is more commonly used in statements about things that could’ve happened but didn’t (counterfactuals), although MAY HAVE is also sometimes used and would not be incorrect. If he was honest with me, I might have forgiven him. If we’d met a few years earlier, we might have been perfect for each other.

When to use must have been?

You can use ‘must have been’ when you are specifying something that have already been done and you are sure of it. Ex : She must have been rude to her. If the above sentence is to be continued, we can say – She must have been rude to her and that’s why she’s upset.

Are a Must meaning?

A necessity; a requirement. For example, The Louvre is a must for visitors to Paris, or This book is a must for serious students of English. [

Can we use must and have to together?

If we are using must to talk bout obligations, then we can’t use it with have to. In other words, we cannot use must to make have to more emphatic.

What tense is must have been?

present tenseThere is no past of ‘must’, so when you say ‘must have been’ you are using present tense, reporting the person’s thoughts as present to them (about the past, hence the following perfect).

What is must have in grammar?

The modal verb must has two past tense forms: had to and must have….“Had to” vs. “must have”Must, have topresentpastWhen expressing obligation, we say: I must go. or I have to go.When expressing obligation, the past of must and have to is always had to: I had to wash my car yesterday . We had to go to bed at 8 o’clock when we were kids.1 more row

What is a perfect gerund?

The perfect gerund refers to a time before that of the verb in the main clause. However, it is only used if the time of the action expressed by the gerund is not obvious from the context: He denied being married. (the simple gerund being refers to the same time as denied : He denied that he was married.)