since從句的用法
下面是小編整理的一些關于介詞since從句的用法的總結(jié), 希望能幫助大家更好地認識since從句,學好英語。
1. Since從句為非延續(xù)性動詞的過去時或現(xiàn)在完成時,時間的起點應該從從句動作完成時刻算起。
例如:
Things have changed a lot since I wrote to you last time.
自我上次給你寫信之后,情況已發(fā)生了很大的變化。
She has lived with us since she has come here.
自從她來到這里,就一直和我們住在一起。
2. Since從句為延續(xù)性動詞的一般過去時,表示動作或狀態(tài)的結(jié)束。其含義與動詞的詞義恰好相反,具有否定意味。
例如:
All has changed since he was at home.
自從他離開家以后,這里的一切都變了。
I haven’t written to her since she lived in London.
自從離開倫敦以來,我還沒有給她寫過信。
He has never been to see me since I was ill.
自從我病愈以來,他一直沒有來看我。
Two years have passed since I last smoked.
我戒煙已經(jīng)兩年了。
但如果since從句是延續(xù)性動詞的現(xiàn)在完成時,則表示動作由開始延續(xù)至說話的時候,具有肯定意味。
例如:
He has never been to see me since I have been ill.
自從我生病以來,他一直沒有來看我。
She has talked little since she has stayed at home.
自從她呆在家里以后,就很少講話。
Since we have owned a car, we have gone camping every year.
自從我們有了汽車后,年年都去野營。
3. 在現(xiàn)代英語中,since從句是延續(xù)性動詞的一般過去時,有時候也可以表示肯定意味。此時,多半用ever來加強since的語義。
例如:
She has known me ever since she was a child.
她從小就認識我了。
I have live here ever since I was born.
我生下來就住在這里。