用since和for造句三个

用how far与since和for造句 How far is it from your home to school?He has known me since he came here.He has known me for ten years.for和since的用法区别 区别：1，Since +时间点，具体时间 “自从、、、以来，从、、、以后” 用来说明动作起始时间 例句：I have been in ...