是because what還是because of what

請看下面的這道題：

Sometimes our opinions differ _______ what we choose to observe and how we deal with what we’ve observed

A. which B. since

C. because D. because of

【分析】此題答案選D，但容易誤選C，因為按英語語法習(xí)慣，because是連詞，其后接句子；而because of是復(fù)合介詞，其后接名詞、代詞或動名詞等。注意：because 作為從屬連詞，主要用于引導(dǎo)原因狀語從句，既然是引導(dǎo)一個從句，也就是說它的后面不能再連用“引導(dǎo)詞”。如：

He was angry because we were late. 他很生氣因為我們遲到了。

They can’t have gone out because the light is on. 他們不可能出去了，因為燈還亮著。

Bread is cheap in this supermarket because they bake it themselves.這家超市的面包是自制的，所以便宜。

假若一個從句已經(jīng)有了自己的“引導(dǎo)詞”，那么它前面就不宜再用 because 這個連詞了。如：

She got angry because of what you said. 她哭是因為你說的話。

句中的 what 相當(dāng)于 the thing that，也就是說 what you said 相當(dāng)于 the thing that you said。其中 the thing 用作 because of 的賓語，而that you said 為修飾 the thing 的定語從句。

He lost his job because of how he treated his boss. 他因為對老板的態(tài)度(不好)而丟了工作。

句中的 how 相當(dāng)于 the way in which，也就是說 how he treated his boss相當(dāng)于 the way in which he treated his boss。其中 the way 用作 because of 的賓語，而in which he treated his boss 為修飾 the way 的定語從句。(from www.網(wǎng)址未加載)

結(jié)論：可說because of what…不能說because what。