Question

Complete the sentence with a suitable verb form:

'Where's your key?' 'I don't know. I _________ it.'

• A. had lost
• B. have lost
• C. will lose
• D. lose

Answer 1

The correct option is

B

have lost

The present perfect tense is used to describe something that happened in the past, but the exact time it happened is not important. It has a relationship with the present.

Have/has + past participle makes the present perfect.

In this sentence, a mention has been made about something which has happened in the past. Now since, the whole sentence is in the first person, we would be using "have" and not "has".

("have" is used in case of first and second person framed sentences.)

Now, for the past participle, it the form of a verb, typically ending in -ed in English, which is used in forming perfect and passive tenses and sometimes as an adjective. In this case the past becomes, "lost".

So, option B is correct.