因为 as a Reason Preposition | HSK 2 Chinese Grammar Guide

Pattern

因为 + reason phrase

Use this HSK 2 pattern to make sentence structure, scope, or emphasis explicit instead of relying on word-for-word English order.

因为下雨，我不去了。

When to use 因为 as a Reason Preposition

Read 因为 + reason phrase as a sentence tool, not just as vocabulary. First locate the main action or claim, then ask what 因为 adds to it.

因为生病，他没来。

Because he was sick, he did not come.

我因为工作很忙。

I am busy because of work.

Do not translate 因为 + reason phrase mechanically from English; check the Chinese word order first.
Keep 因为 close to the part of the sentence it controls.
Do not overuse the pattern in every sentence; use it when it adds a clear role.

Luyện đúng mẫu này trước khi chuyển sang phần khác.

下雨，我不去了

Because it is raining, I will not go

yīn wèi

Missing grammar piece

Nghĩa

because