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We have learnt many words.
表示从过去开始一直持续到现在的动作或状态，常与for或since连用。
如：We have learnt English for 2 years.
（我们已经学习英语两年了。）
基本用法（二）
[Can you guess？]
1.I have had my lunch.
2.They have lived here for 10 years.
3. She has seen the film.
4. He has read the book.
现在完成时的构成：
助动词 have / has +动词的过去分词
过去分词
（一）规则变化
（原形） （过去式） （过去分词）
1.work → worked → worked
2.study → studied → studied
3.live → lived → lived
4.stop → stopped → stopped
（二）不规则变化
1.go → went → gone
2.come → came → come
3.see → saw → seen
4.take → took → taken
5.give → gave → given
6.do/does → did → done
现在完成时的句式
肯定句
否定句
疑问句