最佳答案:后面那个才是对的,没有前面那种说法,不地道.
最佳答案:She dances nowShe doesn't dance nowDoes she dance now?Yes,she isWhat is she doin
最佳答案:原句:He is going to play football.否定句He isn't going to play football.疑问:Is he goin
最佳答案:Do they have three apples?Yes,they do.No,they don't.They don't have three apples