Question

现在完成时中since和for的区别，各举一个例句

Answer 1

FOR +时间段
SINCE +表示过去的时间点/ 从句。如

He has worked for two hours .
He has worked since two hours ago.

加油！不明白再问！如果帮到你，请采纳，谢谢！

Answer 2

since表示动作的起始时间，for可以表示动作延续时间的长度。
例如：I have lived here for more than twenty years.(我在这儿住了二十多年了）
I have lived here since I was born.(我从出生起就住在这儿了）

追问

so和such与冠词连用时候的区别 并各举一个例句