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詞“when, where, how, why ”。此外,連接詞“whether”也適用?! 耙蓡栐~+不定式動詞”結(jié)構(gòu)有何功用呢?其主要功用有下列五種: ⑴當(dāng)主語,如: when to hold the meeting has not yet been decided. where to live is a problem. how to cope with the rising cost of living bees a daily discussion topic. ?、飘?dāng)賓語,如: we must know what to say at a meeting. he could not tell whom to trust. do you know how to play bridge? ?、钱?dāng)補(bǔ)足語,如: the problem is where to find the financial aid. the question is who to elect. ?、犬?dāng)名詞同位語,如: tom had no idea which book to read first. do you have a rough impression how to do it? ?、僧?dāng)賓語補(bǔ)足語,如: jim is not sure whose to choose. mary and john are not certain whether to get married or not. 適用于“疑問詞+不定式動詞”的動詞包括:“know, see, decide, tell, ask, consider, discover, explain, forget, guess, hear, imagine, inquire, learn, remember, think, wonder, understand”等?! ∮悬c值得特別注意的是:當(dāng)這結(jié)構(gòu)當(dāng)賓語