濟南考博培訓

考博英語語法詳解　　

考博英語語法：非謂語動詞?？嫉钠渌Y(jié)構(gòu)
　　(1)疑問詞 不定式結(jié)構(gòu)
　　疑問詞who，what，which，when，where和how后加不定式可構(gòu)成一種特殊的不定式短語。它在句中可以用作主語、賓語、表語和雙重賓語。如：
　　When to start has not been decided.何時動身尚未決定。(主語)
　　I don’t know what to do.我不知道該怎么辦。(賓語)
　　The difficulty was how to cross the river.困難在于如何過河。(表語)
　　I can tell you where to get this book.我可以告訴你哪里可以買到此書。(雙重賓語)
　　(注)A.有時疑問詞前可用介詞，如：
　　I have no idea of how to do it.我不知道如何做此事。
　　B.動詞know 后面不能直接跟不定式作賓語，只能跟疑問詞(如：how, what) 不定式：
　　While still a young boy, Tom knew to play the piano well and as he grew older, he wrote operas, the most famous of which is Carmen.