九年級英語上冊期中知識點-免費閱讀
【正文】 動詞不定式作主語To give is better than to receive.To reach there on foot is impossible.動詞不定式作主語時，可以用it 代替，把實際主語不定式放在后面。ItisreportedthatabouttwentychildrenhavediedoffluintheUSA.據(jù)報道美國大約二十名兒童死于流感。It seemed selfish of him not to give them anything. 他不給他們?nèi)魏螙|西，這顯得太自私了。如：It+be+名詞+to do It’s our duty to take good care of the old.It takes sb+some time+to do How long did it take you to finish the work?It+be+形容詞+for sb+to do It is difficult for us to finish writing the position in a quarter of an hour.It+be+形容詞+of sb+to do It is stupid of you to write down everything (that) the teacher says.It seems(appears)+形容詞+to do It seemed impossible to save money.在句型中，常用表示客觀情況的形容詞，如：difficult，easy，hard，important，impossible，necessary 等。一. 定義：由to+動詞原形構成。(說明他下樓時的情景)動詞不定式作狀語Later he left home to work in different cities. 不久他離開家到不同的城市工作。We helped her (to) repair her bike. 我們幫助她修理自行車。2. 使役動詞let, have, make及感官動詞see, watch, no
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