过去式 例 be:was/were do:did have:had……
过去进行时 例 was going / were doing……
一般现在时 例 go/gose do/dose……
现在进行时 例 is doing/ is watching……
将来时 例 is going to do/ will.../is doing ……
过去将来时 例 would/ was going to be ……
初中大概就这么几个用法