一道前几年的高考选择题
The chair looks rather hard,but in fact,it was very comfortable to _______. A.sit B.sit on C.be sat D.to sat on 为什么?
B 不定式作表语形容词的状语，和句中主语构成逻辑上的动宾关系时，不定式多用主动形式。这时因为人们往往认为形容词后省去了for one或for people。例如： He is hard to talk to.(for one to talk to him) The book is difficult to understand.(for someone to understand the book) 但是若强调句中的受事者，也可用不定式被动式。例如： The handwriting is very difficult to be read. The box is too heavy to be lifted. 另外是sit on chair,介词on是不可省略的
选择B 完整的词组应该是sit on the chair 虽然在句子中，chair到前面去了，但是词组不能少结构
B。sit on the chair啊
答案：B. 如果不定式为不及物动词，其后应有必要的介词。当动词与介词连用时，常位于"形容词+动词不定式"结构的末尾。
答：it 是形式主语。。 to do是真正的主语 不定式可以做主语，句子可以变换成 to sit on is very comfortable 但大多数情况将不定式...详情>>
