1、a friend who helps you're in trouble is a --------(真正的）fri

1. too many; too much

   too many+可数名词的复数形式；

   too much+不可数名词。

2. walk back+副词，home可以是副词，也可以是名词。所以，直接用walk back home即可。 walk back + to+名词。 如：walk back to school。 3. Shall we +动词原形。 因为此时shall属于情态动词。 shall有时是助动词，表示将来。后面也接动词原形。 4. tell sb to do sth. 否定：tell sb. not to do sth. 5. hope 只有两个用法： sb. hopes to do sth sb. hopes that 从句， 可以省略。 例如： I hope to go there with you. I hope (that) you will have a wonderful vacation.