作业帮现在进行时的用法
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现在进行时的用法
现在进行时的用法
现在进行时的用法
现在完成时可以和带有since或for等表示“一段时间”的状语连用,表示动作或状态从某一时刻开始,一直持续到现在.如：I haven't seen him for two years. 但是,像come,arrive,buy等终止性动词不能与表示“一段时间”的状语连用.要用,必须改为“be(在)”等延续性动词来表述.现归纳总结一下由非延续性动词到延续性动词的转换：
arrive→be here begin(start)→be on
die →be dead come back→be back
leave →be away 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 →have
catch(a cold)→ have(a cold) get to know →know
begin to study→study come to work→work等
如：He has been a soldier for three years.他参军三年了.
His father has been dead for two years.他父亲去世二年了.
The film has been on for ten minutes.电影已开始十分钟了.
We have studied English for three years. 我们(开始)学英语已三年了.
be动词加动词ing
现在进行时用来表示正在进行的动作或者正在发生的事情。
如： I am typing now.