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您还可以使用当前的完成时间

时间:2021-06-15 11:50   来源:未知   作者:佚名   点击:

This war lasted a long time.

There are some verbs (e. You can also use the current complete ongoing tense,Not surprisingly, lie, life, Look, rain, go to bed, sit, snow, station, Stay, the study, teach, wait, miss you, position, There are a lot more.

i’ve lived [been living] here for 30 years。) Can use two tenses at the same time,The meaning is not much different.such as:

He changed his mind.

Some static verbs can only be used in the present perfect tense,Usually cannot be used in the current full progressive tense

He wiped the windows clean. (The operation may not be completed)

how long have you worked [been working] here? How long have you worked here?

He has been cleaning the windows. The war lasted a long time. We studied here for two years. For example: How long have you been studying English?

I have known him for many years. He has been cleaning the windows.(Action complete)

.Such as:.Such as:

Certain verbs can be used in the present perfect tense.

The current perfect state emphasizes the completion of the action,right now,The completion of the schedule emphasizes the continuation of the action,and so,Indicates that the operation has been completed,You can only use the current perfect tense

When the action continues,Although the perfect tense can be used now,You can also use the current completion time,but,The completion of the timetable now emphasizes the progress of the action. You cannot use the current tense

He has cleaned the windows.

Positive: How long have you been studying English?

The similarities between the present perfect tense and the present perfect tense: when expressing an action that started but continued or just ended in the past,

We studied here for two years.

Now in many cases the action has been completed,This is not the case in the current situation. I have known him for many years. I have lived here for 30 years.Such as:

He has slept for ten hours. He changed his mind.

g.such as:

optimistic: he has slept for ten hours.

Optimistic: He has slept for ten hours.and so, When it is necessary to clearly indicate that the operation will continue,The application is now complete. on site, position, teach, the study, There are a lot more

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