Look at...要注意什么是不可省略的.如果后面有跟句子,句子一定是什么时态?

Look at...要注意什么是不可省略的.如果后面有跟句子,句子一定是什么时态? 省略乘号时要注意什么 stay at home为什么要加at?at可以省略 look at Look at look at look at watch,see,notice,look,look at的用法及区别在做题的时候应该注意些什么? look 和 look at 区别 定语从句所有省略问题.关系代词及先行词可省略和不可省略部分分别造句举例说明.看到有人说从句做主语时不能省略,The boy who is standing at the door is my brother.The boy standing at the door is my brother . 什么是不可竞争费用 什么是不可回收物 什么是天机不可泄露 look at she还是look at her look as at / look back at RT please look at the black board.do you know this word?look at要不要改成look? Can you （ ）my watch,please?A.look B.look like C.look after D.look at理由都要 look forward to使用时要注意什么?