英语中动词作主语有几种情况 英语中动词做主语就要加ing吗
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To look after children is her job today.
Looking after children is her job/work..\u7b2c\u4e00\u53e5\u662f\u8bf4\u2018\u5979\u4eca\u5929\u7684\u5de5\u4f5c\u662f\u770b\u5b69\u5b50\u2019\uff0c\u4e0d\u662f\u8bf4\u5979\u7684\u4e00\u751f\u7684\u5de5\u4f5c\uff0c\u662f\u6307\u4e00\u4e2a\u5177\u4f53\u7684\u5185\u5bb9\u3002\u800c\u7b2c\u4e8c\u53e5\u662f\u8bf4\u2018\u5979\u7684\u5de5\u4f5c\u6027\u8d28\uff0c\u6216\u5979\u7684\u4e00\u751f\u5de5\u4f5c\u2019\u5c31\u662f\u7167\u770b\u5b69\u5b50\u3002
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\u52a8\u8bcd\u505a\u4e3b\u8bed\u9700\u8981\u52a0ing\u3002
\u6bd4\u5982\uff1aSwimming is very popular in summer.\u590f\u5929\u6e38\u6cf3\u5f88\u53d7\u6b22\u8fce\u3002
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1\u3001\u4f5c\u8c13\u8bed
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\u4f8b\u5982:
He is reading a book now.\u4ed6\u6b63\u5728\u770b\u4e66.
He was watching TV when his mother came in.\u4ed6\u5988\u5988\u8fdb\u6765\u65f6\uff0c\u4ed6\u6b63\u5728\u770b\u7535\u89c6\u3002
2\u3001\u52a8\u8bcd\u4f5c\u4ecb\u8bcd\u7684\u5bbe\u8bed\u8981\u52a0ing(\u52a8\u540d\u8bcd)
I'm looking forward to seeing you again.\u6211\u671f\u76fc\u7740\u518d\u6b21\u89c1\u5230\u4f60.
The boy is so excited about hearing from his mother.\u7537\u5b69\u4e3a\u6536\u5230\u4ed6\u5988\u5988\u7684\u6765\u4fe1\u5f88\u5174\u594b\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1--ing\u5f62\u5f0f
To go to college is our ideal. 上大学是我们的理想。
To learn foreign languages is difficult. 学外语很难。
为了平衡句子，通常用it做形式主语替不定式，即：
It’s+名词/形容词+for/of sb.+to do sth. (注：此句式中不定式逻辑上的主语可由for或of引出，当表语的形容词为修饰逻辑主语sb. 的kind，nice，good，polite，clever，foolish，right，wrong等时，逻辑主语由of引出)
It takes (sb.) some time (hours, months, days, a lot of time, patience...)＋to do sth
2. 动名词做主语，谓语动词为单数
Doing lots of exercise is good for health.
Saving money is a good habit.
3. 不定式和动名词作主语的区别:
一般情况下,不定式与动名词作主语可以互换,也常常可以用it充当形式主语,而把不定式和动名词放在句子的后半部分。但二者也有区别,不定式常常指某次具体的、将要发生的行为;而动名词则表示一般的、抽象的行为。
(1) 动名词作主语通常表示抽象动作;而不定式作主语表示具体动作。
Smoking is prohibited(禁止)here.这里禁止抽烟。(抽象)
It is not very good for you to smoke so much.你抽这么多烟对你身体很不好。(具体)
(2) 动名词作主语时，通常用以表示一件已知的事或经验。不定式短语通常用来表示一件未完成的事
或目的。
Climbing mountains is interesting.爬山很有趣。(经验)
Driving a car during the rush hour is tiring.在高峰时刻开车令人厌烦。(经验)
To finish the task will take a long time. 要完成这项任务将要花费很长时间。(具体)
(3) 不定式做主语，一般用it当形式主语，把作主语的不定式短语后置。
It took me only five minutes to finish the job.
祈使句，动词的现在分词过去分词
绛旓細1. 鍔ㄨ瘝涓嶅畾寮 to do 鍋氫富璇細涓鑸綅浜庡彞棣栵紝璋撹鐢ㄥ崟鏁 To go to college is our ideal. 涓婂ぇ瀛︽槸鎴戜滑鐨勭悊鎯炽俆o learn foreign languages is difficult. 瀛﹀璇緢闅俱備负浜嗗钩琛″彞瀛愶紝閫氬父鐢╥t鍋氬舰寮忎富璇浛涓嶅畾寮忥紝鍗筹細It鈥檚+鍚嶈瘝/褰㈠璇+for/of sb.+to do sth. (娉細姝ゅ彞寮忎腑涓嶅畾寮忛昏緫涓婄殑...
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绛旓細鍔ㄨ瘝涓嶅畾寮忎綔涓昏鏃,鍙ュ瓙鐨勮皳璇姩璇嶅父鐢ㄥ崟鏁,鍏朵綅缃湁浠ヤ笅涓ょ:(1)鎶婁笉瀹氬紡缃簬鍙ラ.濡:To get there by bike will take us half an hour.(2)鐢╥t浣滃舰寮忎富璇,鎶婄湡姝ｇ殑涓昏涓嶅畾寮忕疆浜庡彞鍚,甯哥敤浜庝笅鍒楀彞寮忎腑.濡:鈶營t+be+鍚嶈瘝+to do It's our duty to take good care of the old.鈶t takes...
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