第二单元知识点.doc

现在完成时:
:
1. 表示___________或____________的动作对现在造成的影响或结果。
I have already read the book.
2. 表示从过去某个时刻开始延续至今的动作或状态,只能用于某些__________动词。
He has taught in our school since three years.
:
1. 用于肯定句:already(已经),just(刚刚),since(自从),so far(到目前为止),for+ 一段时间
2. 用于否定句和疑问句:yet(还,未),ever(曾经),never(从来,绝不)
例: I have already finished my homework.
He has just had his meal.
Have you ever listened to this music?
They haven’t finished it yet.
三. 句型:
肯定句:主语+________/________+ done+其他。
1. They have studied in Beijing for five years.
2. He has joined the football team since he was eight years old.
否定句:主语+have/has+ _______+ done+其他。
1. ____________________________________________
2. ____________________________________________________________
一般疑问句:_______/________+主语+done+其他?
1. ____________________________________________
2. ____________________________________________________________
特殊疑问句:__________疑问词(_______/________/________/_________)+ 一般疑问句?
1. They have studied in Beijing for five years.
_________________________________________________
2. They have studied in Beijing for five years.
_________________________________________________
3. They have studied in Beijing for five years.
_________________________________________________
:
(一)规则变化:
1. 一般情况下,动词词尾加-ed.
2. 以不发音的e结尾动词,动词词尾加-d.
3. 以辅音字母+ y结尾的动词,把y变为i 再加-ed.
4. 以辅元辅结尾的动词,双写尾字母,再加-ed.
(二)不