1.These girls play tennis.谓语是play,陈述句中只有一个实义动词作谓语且其时态为一般现在时,变为一般疑问句时要在句首加do或does 主语后的实义动词用原形,变为 Do these girls play tennis?
2.My good friends like ice cream.变否定句,在谓语动词前加上否定词,变为：My good friends dont like ice cream.
3.They play basketball well.变否定句,They don't play basketball well.做法同上
4.I eat lots of fruit.变否定句,I don‘t eat lots of fruit.做法同上
5.She has eight baseballs.变否定句,当句中存在has等第三人称单数的形式时,讲否定词提前,第三人称单数变为原型,变为She doesn’t have eight baseballs.
6.Her father likes chicket.变否定句,Her father doesn‘t like chicket.做法同上