频率副词（Adverbs of frequency）

学习视频地址

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这三个句子中只有一个是正确的。

当学习一门语言时，你需要做的一件事情是：不仅仅要学习词汇，而且还有知道词汇应该放在句子中的哪个位置.

本节主要来学习在构建句子时，我们常见的一些频率副词，它们在句子中正确的位置。

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对于频率副词，实际上有三种模式可以遵循：

先看前两种模式：

• We put the adverb of frequency after the verb to be
• But we put the adverb of frequency before other verbs all other verbs

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// 频率副词放在be后面
I am `usually` on time.
She was `always` polite.

// 频率副词放在动词前面
I `usually` arrive on time.
She `always` spoke politely.

看第三种模式：

Look at the third pattern so when the verb consists of more than one word .
For example, when we have an auxiliary verb or we have a helping verb or we have a modal verb so then we have let's say the helping partor the modal part and then we have the main verb then we put the adverb of frequency in the middle.

当动词包含多个单词时，比如，有一个助动词 或有一个帮助动词，或有一个情态动词，那么我们就先说 the helping part 或 the modal part，然后我们再说 主要动词，然后我们把频率副词放在中间。

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He can `always` visit us.
We could `always` leave early.

• visit 和 leave 是 main verb
• auxiliary verb 和 helping verb 和 modal verb 归为一类词，其实就是：

现在式         过去式 
     can       →   could
     will      →   would
     may       →   might
     shall     →   should(注:shall=will有未来之意。should通常用于现在式，表应该之意)
     do/does   →   did
     have/has  →   had
     must

• 所以频率副词 always 放在了 can和visit中间；放在了 could和leave中间；

练习一下

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