过去完成时 PAST PERFECT怎么样
present perfect;:indefinite past
past perfect tense
present perfect tense,past perfect tense
THE PERFECT TIME怎么样
PERFECT TIME怎么样
PERFECT COMBINATION怎么样
THE PERFECT CUP怎么样
THE PERFECT MAN怎么样
造句用 past simple and present perfect
present perfect,simple past,请帮忙答题.
用present perfect tense ,simple past tense ,
past continuous/present continuous/present perfect continuou