2 it作主语
While we'll learn a lot with the great instruments we have aboard the rover, it may very well require the far more well-equipped laboratories and delicate instruments back here on Earth to tell us whether our samples carry evidence that Mars once harbored life.
请问这句话中it作形式主语，不定式作真正主语吗？还是说不定式作宾补，那it指什么呢？
最佳答案 2021-09-15 15:19
While we'll learn a lot with the great instruments we have aboard the rover, it may very well require the far more well-equipped laboratories and delicate instruments back here on Earth to tell us whether our samples carry evidence that Mars once harbored life.
it 是人称代词，不是形式主语。如果不是指代前文某个事物的话，那它应该就是指代 “the rover”。不定式 to tell us whether...作宾补。基本结构： require sb. to do sth.
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