来源:网络来源 作者:中考网编辑 2019-09-25 15:20:34
例如:He has turned off the light.他已把灯关了。(动作结束于过去,但说明的是现在的情况--灯现在不亮了。)
现在完成时"完成用法"的特点是动作不延续,因此,该时态只能与表示不定的过去时间状语(如:already,yet,before,recently等)、频度时间状语(如:never,ever,once等)、包括现在时刻在内的时间状语(如:this morning / month /year...,today等)连用。
7.现在完成时的"未完成用法"现在完成时的"未完成用法"指的是动作开始于过去某一时刻,一直延续到现在,或可能还要继续下去。
此种用法的句中常需一个表示一段时间的状语(由since或for引导),或表示与现在时刻相连的时间状语(如:up to now,so far)等。
注意:(1)现在完成时的未完成用法只适用于延续性动词,不可用于终止性动词,即瞬间完成或延续时间很短的动词。如:come,go,arrive,leave,join,become,die等。
8.一段时间+has passed+since从句
9. 现在完成时常和短语 "up to now /till now","so far" (意思是从过去某一确定的时间一直延续到现在)连用。
例如:Up to/till now he's read many story books. 至今他已读过好多故事书。
例如:I've been to New York three times so far. 至今我已到纽约去过三次。
has gone (to)/has been (to)/has been (in) 的区别
has gone to:去了没回
has been to :去过
has been in:呆了很久
10.不能与when连用
11.不可以与一般过去时的定义混淆
五、动词的替换
延续性动词和非延续性动词的替换
begin(start)→be on
die →be dead
leave →be away (from)
fall ill(sick, asleep)→be ill(sick, asleep)
get up→be up
go out →be out
finish →be over
put on →wear 或be on open →be open
join →be in或 be a member of
close →be closed
go to school→be a student
borrow →keep
buy/get →have
catch(a cold)→ have(a cold)
get to know →know begin to
study→study
come to work→work
move to → live in
finish/end → be over
come to → be in
sit down → be seated
marry → be married
dress → be dressed
欢迎使用手机、平板等移动设备访问中考网,2024中考一路陪伴同行!>>点击查看