题目内容：

非谓语的一些问题
when he got off the train,it happened ( to be raining )
为什么括号里不可以填to rain呢
如过翻译成他刚下火车,天碰巧开始下雨.
besides （ being beautiful ),she is kind and tender.
为什么这边不可以填beautiful
不是形容词可以做伴随的吗
surprised and happy,tom stood up and accepted the gift.
what did the master want (done ) to the noisy children.
如果这边填done的话改成to be done
如果可以的话为什么选项doing是错误的呢?
不是want doing = want to be done