现在完成时表示到现在为止,已经完成的动作或存在的状态。在时间状语从句中用现在完成时表示将来要完成的动作
过去完成时表示到过去某一时间或动作为止,已经完成的动作或存在的状态。在表示过去没有实现的愿望、想法等意思时,要用过去完成时。
将来完成时则表示到将来某一时间或动作为止,将要完成的动作或存在的状态。
例如:
We have learned 2,500 English words by now.
I’ll go on a trip to Si’an when I have finished writing this book.
We had learned 2,000 English words by the end of last term.
I had hoped to visited you last weekend ,but I was too busy then.
We will have learned 35,000 English words by the end of next month.
练习:
牛津苏教[2012秋]三上《Unit7 Would you like a pie》ppt课件4
苏教牛津版英语三上《Unit 7》PPT课件8
牛津苏教[2012秋]三上《Unit 5 Look at me》ppt课件1
牛津苏教[2012秋]三上《Unit 1 Hello》ppt课件3
牛津苏教[2012秋]三上《Unit 5 Look at me》ppt课件8
牛津苏教[2012秋]三上《Project 2 A puppet show》ppt课件
牛津苏教[2012秋]三上《Unit 8 Happy New year》ppt课件3
牛津苏教[2012秋]三上《Unit 1 Hello》ppt课件4
牛津苏教[2012秋]三上《Unit7 Would you like a pie》ppt课件1
牛津苏教[2012秋]三上《Project 1 My family and friends》ppt课件1
2014秋江苏译林版三上《Project 2 A puppet show》ppt课件3
2014秋江苏译林版三上《Unit 4 My family》ppt课件5
牛津苏教[2012秋]三上《Unit 5 Look at me》ppt课件7
牛津苏教[2012秋]三上《Unit 5 Look at me》ppt课件5
牛津苏教[2012秋]三上《Unit 5 Look at me》ppt课件3
2014秋江苏译林版三上《Unit 5 Look at me》ppt课件4
牛津苏教[2012秋]三上《Unit 1 Hello》ppt课件2
苏教牛津版英语三上《Unit 8》PPT课件10
牛津苏教[2012秋]三上《Unit7 Would you like a pie》ppt课件2
牛津苏教[2012秋]三上《Unit 6 Colours》ppt课件2
牛津苏教[2012秋]三上《Unit 8 Happy New year》ppt课件
牛津苏教[2012秋]三上《Unit 5 Look at me》ppt课件4
牛津苏教[2012秋]三上《Unit7 Would you like a pie》ppt课件5
2014秋江苏译林版三上《Unit 5 Look at me》ppt课件1
牛津苏教[2012秋]三上《Unit 1 Hello》ppt课件
2014秋江苏译林版三上《Project 1 My family and friends》ppt课件1
2014秋江苏译林版三上《Unit 4 My family》ppt课件3
2014秋江苏译林版三上《Unit 4 My family》ppt课件6
牛津苏教[2012秋]三上《Project 1 My family and friends》ppt课件2
2014秋江苏译林版三上《Unit 5 Look at me》ppt课件3
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