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難點(diǎn)三：與動(dòng)詞know連用要注意什么

當(dāng)要表示知道如何做某事，know之后不能直接跟動(dòng)詞不定式作賓語(yǔ)，此時(shí)可改用know how to結(jié)構(gòu)。如：

我會(huì)做西班牙式的攤雞蛋。

誤：I know to make Spanish omelettes.

正：I know how to make Spanish omelettes.

難點(diǎn)四：與某些只接動(dòng)名詞作賓語(yǔ)的動(dòng)詞連用

有些動(dòng)詞可以接“疑問(wèn)詞+不定式”作賓語(yǔ)，但通常不直接跟不定式作賓語(yǔ)。這類動(dòng)詞主要有consider (考慮), discover (發(fā)現(xiàn)), discuss (討論), explain (說(shuō)明), find (out) (查到), know (知道), observe (觀察), suggest (提議), wonder (懷疑), understand (了解)等。如：

Have you considered how to get there? 你是否考慮過(guò)如何到那兒去?

Our teacher explained how to use the machine. 老師向我們說(shuō)明如何使用這臺(tái)機(jī)器。

We discussed what to do and where we should go. 我們討論了該怎么辦及到哪里去。

你能說(shuō)明一下蛋糕的做法嗎?

誤：Can you explain to make a cake?

正：Can you explain how to make a cake

難點(diǎn)五：which to do的兩種用法

要注意“which+不定式”結(jié)構(gòu)，其中的which有時(shí)是疑問(wèn)詞。如：

I can’t decide which to choose. 我不能決定選哪個(gè)好。

Did you ask her which to buy? 你問(wèn)沒(méi)問(wèn)她該買哪一個(gè)?

有時(shí)可能是關(guān)系代詞，相當(dāng)于一個(gè)省略的定語(yǔ)從句，此時(shí)主要用于介詞后作賓語(yǔ)。如：

She must have time in which to grow calm. 她必須有冷靜下來(lái)的時(shí)間。

Allow me one minute in which to change my costumes. 給我一點(diǎn)時(shí)間來(lái)卸裝。

這兩句中的which to…也可改為定語(yǔ)從句：

She must have time in which she can grow calm.

Allow me one minute in which I can change my costumes.

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