wǒmen huílái le,wǒmen dōu hěn gāoxìng.

We came back, and we are all very happy.

Breakdown of wǒmen huílái le,wǒmen dōu hěn gāoxìng.

• 很hěn: very
• 我们wǒmen: we
• 都dōu: all
• 了le: perfective particle

Questions & Answers about wǒmen huílái le,wǒmen dōu hěn gāoxìng.

What does 了 do in 我们回来了?

Here 了 is sentence-final (change-of-state) 了. It announces a new situation: “We’re back now.” It’s not just “past tense.” Compare: 下雨了 “It’s started raining.”

Can I just say 我们回来?

Not to announce arrival. 我们回来 without 了 sounds habitual or future (“we come back / will come back”). To say “We’re back,” use 我们回来了.

How do I say “We haven’t come back yet”?

Use 没(有): 我们还没回来。/ 我们还没有回来。
Don’t use 不 here: 我们不回来 means “we won’t come back” or “we don’t come back (in general).”

Why is 都 after 我们? Where does 都 go?

Pattern: Subject + 都 + Predicate. It comes right after the group it quantifies and before the verb/adj:

• 我们都很高兴。
• 我们都回来了。

Do I have to use 都?

No.

• 我们很高兴 = “We’re happy” (group statement).
• 我们都很高兴 = “Every one of us is happy” (distributive emphasis).
  Use 都 when you want to stress “all/both.”