這兩個詞都可以和表示時間的詞語連用。一般說來,for后接一段時間,用以說明某事一直進行了多長時間,而since后接某一時間(過去的一個時間點),用以表示某件事開始的時間。
1.since+過去一個時間點(如具體的年、月、日期、鐘點、ago. 1990 , last month , half past six
I have been here since 1990. 1990起,我一直在這兒。
2.since+ 一段時間+ago
I have been here since five months ago。自從五個月前,我已經在這兒了。
3.since+從句
Changes have taken place since you left. 自從你走后,已經發(fā)生了很大的變化。
4.It is +一段時間+since從句
It is two years since I became an English teacher. 我成為英語老師有兩年了。
1.Since+時間點,具體時間
“自從、、、、以來,從、、、以后”用來說明動作起始時間
I have been in Beijing since 2010.
2.For + 時間段,用來說明動作延續(xù)時間長度,因此句中的謂語動詞,也應該是延續(xù)性動詞。
I have been in Beijing for one year。
We have learnt English for about three years.
I have been here for 3 days. (對)
I have arrived here for 3 days.(誤)
以上就是初中英語學習:since和for的用法口訣的全部內容,大家趕快學起來吧!