Question

向您请教几个英语语法问题，谢谢。

1：This dictionary is devoted to explaining word usage和This dictionary is devoted to explain word usage.哪句对？另一句为什么不对？还是都对？
2：they agreed temporarily to stay. sam temporarily remained silent. 两句话中temporarily的位置为什么不一样？
3：nick has been thinking about changing his job。为什么change是ing形式.?

Answer 1

This dictionary is devoted to explaining word usage.
这句对，这里的to是介词，后面接V-ing形式。
they agreed temporarily to stay. sam temporarily remained silent. 两句话中temporarily的位置为什么不一样？

因为temporarily这个副词的用法很灵活，可以放在居中，还可以放句尾。
nick has been thinking about changing his job。为什么change是ing形式.?

Think about doing sth 是固定搭配。
你读几年级啊？