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不定詞(infinitive),動狀詞之一,主要指的是 "to V" 這種形式。不定詞與 infinite(意為『無限』或『不定』)這個英文字有關聯。相對於只作名詞使用的動名詞,不定詞可作名詞、形容詞或副詞使用,用法並不固定,故謂之『不定詞』。在使用上,不定詞有時因搭配助動詞、感官/使役動詞或某些特殊句型,需省略 "to"。另外,不定詞之後亦可視其及物或不及物接受詞或補語,形成不定詞片語。
不定詞(片語)作名詞用
1. 作主詞用(限接單數動詞)
To make more friends is my first goal.(主詞)
(多交一些朋友是我的第一個目標。)
It's a pleasure to talk with you .(真主詞)
(跟你談話真是愉快。)
2. 作受詞用(常接於表『意願』或『企圖』的動詞之後)
句型:S +
afford, agree, arrange, attempt,beg, choose, decide, expect,forget, hope, intend, learn, manage,offer, plan, refuse, want, wish
+ to V
We can't afford to travel overseas .(受詞)
(到海外旅遊我們負擔不起。)
Those soldiers refused to surrender .(受詞)
(那些士兵拒絕投降。)
I want to get a refill .(受詞)
(我要續杯。)
Her last wish is to see her grandson once more .(主詞補語)
(她最後的願望就是再見她的孫子一面。)
The police believe him to be above suspicion .(受詞補語)
(警方認為他沒有嫌疑。)
1. My grandparents make it a rule _______ to bed before 10 o'clock, and they usually get up at dawn.
(A) to go (B) going (C) and go (D) gone
2. For you _______ Harry to do me a favor would be a great mistake, mind you.
(A) ask (B) asking (C) asked (D) to ask
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