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定式放在謂語之后。例如: ? He find it difficult to learn Chinese. ? We think it important to master a foreign language. 3. 作賓語補(bǔ)足語 He invited me to give a speech on Chinese history. (不定式 to give a speech on Chinese history 做賓語補(bǔ)足語,補(bǔ)充說明賓語 me) I have a letter to post. (不定式 to post做定語,修飾名詞 letter) 1)做定語的不定式如果是不及物動(dòng)詞,不定式后面須有相應(yīng)的介詞。例如: They worked hard day and night to pay back the debt. 表示結(jié)果 。例如: She felt disappointed to hear the news that she hadn’t been promoted. Pass the sentences on Thanks to my friends, my life seem to be getting easier and more interesting. Matthew may pretend to be making friends with Peter. Personally, I feel happy to have made some good friends. He is said to have recovered friendship with Tom. 不定式還有進(jìn)行形式 (to be doing) 和完成形式 (to have done) They seem to be reading in the library. (動(dòng)詞不定式 to be reading表示動(dòng)作 read正在發(fā)生 )