34.Recently archaeologists have strived to develop theories, based on archaeological evident, that explain societal changes such as the development of farming..
to 有两种用法,我一直弄不清在什么情况下to 是表示不定式,在什么情况下to是表示介词的用法。因为如果用作不定式,后面一定是跟动词原型,(如上面的34题)如果用作介词后面是可以跟动名词的。
所以我想请教辩别to的用法可有什么窍门 |