内容正文:
Unit1 topic 3
语法聚焦
since和for
短暂和持续
since 和for的区别
① for +一段时间
We have learnt English for about 2 years.
我们已经学英语两年了。
② since +过去的某个时间点/一般过去时的句子
We have learnt English since 2010. 从2010年我们就学英语了。
I have been here since I was ten.我十岁就来这里了。
③ since +一段时间+ago
We have known each other since five years ago.
五年前我们就认识了。
④ It‘s+一段时间+ since +过去式
It’s five years since I came here.从我来到这里已经五年了。
=I have been here since five years ago .
=I have been here for five years.
e.g. I have been in the new school for a week.
for a week
last week
present
past
for + 时间段
e.g. Lily has been away from home since
last Friday.
since last Friday
last Friday
present
past
since + 时间点
Fill in the blanks with for or since.
1. His father has been dead ___ many years.
2. He has been away from the army _____
seven years because of a leg wound.
3. He has been in Beijing ______ 2003.
4. He has been a member of Helpers’ Club
_______ 2004.
5. He has had a house ______ 2005.
6. He has kept the car ______ one year.
for
for
since
since
since
for
短暂性动词也称做终止性动词、非延续性动词或瞬间动词,表示动作不能延续,只是一瞬间就结束的动作.
常见的短暂性动词有:come, go, arrive, reach, see, hear, close, open, leave, begin, start, lose, buy, fall, join, die, become, borrow, get up等.
非延续性动词可以转换成延续性动词,主要
有以下几种:
①、用相应的延续性动词;
buy ------ have,
borrow ----- keep
come/go/become ------ be
get to know------ know
catch a cold------have a cold
②、转换成 be﹢名词;
join the Party ------ be a Party member,
join the army ------ be a soldier/a member of
go to school ------ be a student.
③、转换成be + 介词短语 :
go to school ------ be in school,
join the army ------ be in the army
put on----- be on
get up ------ be up
④、转换成be + adj./adv. :
die ------ be dead,
finish ------ be over,
begin/start ------ be on,
leave ------ be away
close ------ be closed,
open ------ be open,
fall asleep ------ be asleep.
marry/get married-------- be married结婚
短暂性动词
come/go/become --------
leav