概要： 2 . 用“……ago”来表示时间状语 His friend joined the army ten years ago . Her husband has been away for five days . 2 . 用“……ago”来表示时间状语 His friend joined the army ten years ago . Her husband left home five days ago . 3 . 用“it is……since……”的结构来替换终止性动词。 It is ten years since his friend joined the army . It is five days since her husband left home . ※ 在……till ( until ) 结构中 和……till ( until ) 结构连用时，延续性动词只能用于肯定式，终止性动词只能用于否定 式。如： He worked until se
高二英语第二十四单元Mainly revision,标签：高二英语选修7教案,高二英语下册教案,http://www.67jx.com2 . 用“……ago”来表示时间状语
His friend joined the army ten years ago .
Her husband has been away for five days .
2 . 用“……ago”来表示时间状语
His friend joined the army ten years ago .
Her husband left home five days ago .
3 . 用“it is……since……”的结构来替换终止性动词。
It is ten years since his friend joined the army .
It is five days since her husband left home .
※ 在……till ( until ) 结构中
和……till ( until ) 结构连用时，延续性动词只能用于肯定式，终止性动词只能用于否定 式。如：
He worked until seven o\'clock yesterday afternoon .
He won\'t come here till Sunday .
※ 在由 when 或 while 引导的状语从句中
终止性动词不能用在由 while ( 当……的时候 ) 引导的时间状语从句中。如：
When I got home , he was watching TV . ( 正 )
While I went into the lab , the old scientist was doing an experiment . ( 误 )
※ 值得注意的两点
1 . 终止性动词一般不可用于进行时态。如 go , come , leave , start 等，有时用于“进 行时态”形式，是表示“即将”的意思。如：
New Year\'s Day is coming near .
Mr White is leaving for London tomorrow .
2 . 终止性动词不可用于“how long……”引出的疑问句。如：
How long have you borrowed the book? ( 误 )
How long have you kept the book? ( 正 )
【 动手动脑 】
单元能力立体检测
1 . none / no one
( 1 ) Up to now _____ has landed on Mars .
( 2 ) _____ of us is perfect .
( 3 ) —Did anyone come to ask for me?
— _____ .
2 . hear sb . do / doing sth .
( 1 ) At midnight I woke up and heard the wind _____ ( blow ) .
( 2 ) Then I often heard him _____ ( play ) the guitar alone on the bank .
3 . be tired of / from
( 1 ) He was tired _____ being interrupted by frequent phone calls .
( 2 ) I\'ve been / got tired _____ intense work .
4 . drop in on / at / to do / for
( 1 ) Will you mind if you drop in _____ my parents on t way home?
( 2 ) He often dropped in _____ tea .
( 3 ) Let\'s drop in _____ Brown\'s at the weekend .
5 . plan to do / planned to have done ( = had planned to do )
( 1 ) We planned to _____ ( visit ) the Emei Mountain , but the floods prevented us from setting off .
( 2 ) I planned to _____ ( run ) a company of my own , so I refused her offer .
6 . expect / hope / wait for
( 1 ) —Why are you standing here?
— I\'m _____ you . ”
( 2 ) The young couple are _____ a baby .
7 . help sb . out / with
( 1 ) When I was in trouble , my neighbors would come to help me _____ .
( 2 ) Little Alice is a good girl ; she often helps her mother _____ housework .
8 . insist that sb . should do / sb . is right ( wrong )
( 1 ) All insisted that what Galileo said ______ ( be ) wrong .
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