萨利认为什么是她来访的主要原因? 再问： 那为什么不用. Think of (认为） 再答： what is the main reason for her visit 是 think 的宾语从句 think"认为” 接宾语从句时不用of 或者about think of 一般接 名词，代词， 动名词 think of 想起, 记起; 想念 考虑 She thinks of no one but herself. 她除了自己外不考虑任何人。 When I said that, I was not thinking of her feelings. 我说那话时, 没考虑到她的感情。 He's thinking of studying abroad. 他正在考虑出国学习。
