1）Many a time (did he come)to see me while (I was)in hospita

1）Many a time (did he come)to see me while (I was)in hospital.
Many a time 也要用部分到装吗?什么语法
2）Hardly does the animals make any movement when it is in its hibernating state.Hardly...when 的句型不是用过完.过去 为什么这句也对?
3）（Should）it rain tomorrow ,we would have to put off the visit to the Yangpu bridge.为什么用Should?
4）I had to(fit )ten appointments (into)one morning.
He can(suit)his conversation (to)whoever he's with.
这两句话说呢么意思?其中的固定搭配是谁呢么?
5）make their own amusements
gather riding
it is better to do something not very well oneself than always to sit and watch others doing it