1.agoodpieceofadvice与apieceofgoodadvice到底哪个对啊?2.Ididn'tdosomereadingyesterday.与Ididn'tdoanyreadingyesterday.到底哪个对啊?我看了很多参考书怎么说的都有把我弄蒙了谁能告诉我到底哪

Question

1.a good piece of advice 与 a piece of good advice 到底哪个对啊?
2.I didn't do some reading yesterday.与I didn't do any reading yesterday.到底哪个对啊?
我看了很多参考书 怎么说的都有 把我弄蒙了 谁能告诉我到底哪个对?
3.He was trying to sleep.中的He was可以缩写成He’s吗?
4.do more exercises 和do more exercise 分别怎么翻译
She's trying to sleep,but Mom and I kept talking.这句中后半句是过去时，前半句又为什么用现在进行式啊？蒙了！

Answer 1

1.a piece of good advice
a piece of是固定搭配,译为一条,一个,一块...等等
2.I didn't do any reading yesterday.
some用在肯定句中,而any用在否定句中
3.不可以
he's=he is或
he's=he has
4.do more exercise 多锻炼
do more exercises多做练习