just now 是什么时态,I saw him watching a football game just now为什么是saw ...doing是进行时

just now 是什么时态,I saw him watching a football game just now为什么是saw ...doing是进行时 I noticed that they came in just now.是什么时态? I saw him go out just now. just now 是什么时态的标志? just now是什么时态的时间状语 情态动词疑问She __ be ill because I saw her playing tennis just now.A.can't B.couldn't C.mustn't D.may not为什么选A?because后半句是过去时态,前面为什么不用C?saw her playing这是什么时态?雪的凝诺 说can't be 是否定 I saw him reading/read just now为什么? I saw him ___ just now.填leave还是left I saw a qig_(lie) under that tree just now i saw a kid (climb)the tree just now I saw the boys( )just now.添skate 或skating 改错 I saw the boy enters Room 1480 just now. I saw that he was playing football just now.改为同义句 I saw ___ ___ football just now. I saw Nick just now .He was playing football.同意句 I saw Nick（ ）（ ）just now They were in the library just now是什么时态? I ----(see) Li Lei -----(go) out just now.答案是saw,go,为什么不是 saw.went. just now用什么时态 just now用什么时态?