在某教辅材料中遇到这样一句话:Listening to English speeches and watching English movies are helpful to improve English.我觉得这里的helpful后用不定式是错误,此错误就类似于我们不说We difficult to make progress而说It is difficult for us to make progress.应该...
One such idea is that fish is the best brain food. Fish is good brain food just as it is good muscle food and skin food and bone food. 这里面的as为什么不可以填because呢?