初中英语时态知识点：现在完成时注意事项

想要学好英语，一定要多做练习，以下所介绍的现在完成时注意事项，主要是针对每一单元学过的知识来巩固自己所学过的内容，希望对大家有所帮助!

1.现在完成时不能单独与准确时间连用，(如表示过去的时间状语)

如yesterday(morning、afternoon),last(morning、afternoon)等，除非与for,since连用.

2.现在完成时往往同表示不确定的过去时间状语连用

,如already(肯定), yet(否定，疑问), just, before, recently,still, lately等:

He has already obtained a scholarship.

I haven't seen much of him recently (lately).

We have seen that film before.

Have they found the missing child yet ?

3. 现在完成时常常与表示频度的时间状语连用,

如often, sometimes, ever, never, twice, on several occasion等:

Have you ever been to Beijing

I have never heard Bunny say anything against her.

I have used this pen only three times. It is still good.

George has met that gentleman on several occasions.

4. 现在完成时还往往可以同包括现在时间在内的时间状语连用,

如now, up to these few days/weeks/months/years, this morning/week/month/year, just, today, up to present, so far等:

Peter has written six papers so far.

Man has now learned to release energy from the nucleus of the atom.

There has been too much rain in San Francisco this year.

The friendly relations and cooperation between our two countries have been enhanced in the past few years.

Up to the present everything has been successful.

5. 现在完成时还可以用来表示过去的一个时间到现在这段时间内重复发生的动作.

We have had four texts this semester.