There is no past tense in Chinese. 了1 le only tells you the action is finished — so it can show up in a sentence about tomorrow, and it can never attach to a verb that describes a state rather than an action.

1S + V + 了了 + (O)

The action is complete, and 了1 always goes immediately after the verb.

Adding Detail: S + V + 了了1 + Number + Measure Word + O

Adding Time: S + V + 了了1 + Time Spent + (的的 de + O)

2Fixed Expressions: 太 tài + SV + 了了 le　／　SV + 死了了 sǐle

This 了 doesn’t add any meaning of its own — it just belongs to these fixed patterns for exaggeration, so you simply memorize them as a set.

3When You Can’t Use 了了1

了1 only works on actions that can be “finished.” Two whole categories of verbs never take it.

Type 1 — State Verbs: 是是 shì / 在在 zài / 姓姓 xìng / 有有 yǒu

These four describe a state or condition, not an action — a state has no “finish line,” so 了1 can never attach to them.

Type 2 — Verbs of Thought Followed by a Clause: 覺得觉得 juéde / 以為以为 yǐwéi / 知道知道 zhīdào / 希望希望 xīwàng

When these verbs are followed by a whole clause — the content of what someone thinks, assumes, knows, or hopes — that clause isn’t a completable action either, so no 了1 goes after the verb.

Type 3 — Quoting: 說说 shuō / 問问 wèn / 回答回答 huídá

When you quote what someone said, asked, or answered, the act of speaking is already obviously complete by the time you’re quoting it — that’s exactly why you can quote it — so 了1 is unnecessary here too.

Type 4 — Multiple Verbs in One Sentence

When a sentence lists a chain of actions in order, 了1 is usually dropped from the earlier verbs and kept only on the last one — if the final action is complete, everything before it must be too.

4Practice

Translate each sentence into Chinese, then tap the card to check your answer.