during time

Indicates within a certain period of time. . .

Time adverbials often used in the present perfect tense! 11

Time adverbials often followed by the present perfect tense:

Such as so far, by now, up to (till) now, for, since, in the past few..., during the last few...etc. We have planted more than two thousand trees by now

The present perfect tense is composed of "have/has past participle" and has two main meanings:

① Indicates that the action occurred in the past, but is related to the current situation. Sometimes there is no time adverbial, and sometimes it is used with some past time adverbials indicating uncertainty, such as: many times, just, yet, ever, never, just, already, before, so far, by now, etc. are used together.

② Indicates an action that started at a certain time in the past and has continued to the present and may continue. It is used for continuous verbs, and the sentence often contains time adverbials expressing a period of time, such as: since time Point/clause, for two months, so far, etc.