Sentence-final 了: something has changed
A 了 at the very end of the sentence announces news: something is now true that was not true before.
Structure
主语 + 谓语（+ 宾语）+ 了（新情况／变化）
Explanation
Chinese words in this text can be activated to show a dictionary gloss.
A that closes the sentence says: this is new. “It’s started raining.” “My son has turned eight.” “He doesn’t smoke any more.” Nothing here has to be a completed action — this can follow an adjective ( “it’s got cold”), a time or number phrase ( “it’s eight o’clock now”), a negated verb ( “I’ve changed my mind, I’m not going”) or a modal ( “I can drive now”). That last group is the clearest proof that this is not about finished actions: reports a decision, and a verb- could never follow .
Position matters. This closes the sentence, after the object: , never .
Because it announces news, it is out of place with habits and permanent facts — takes no at all. And when the news is precisely that something has now been done, the change and the completion land in the same slot and become hard to tell apart: ？—— works either way. Beginners do not need to label it; what they need is to notice whether the sentence reports a change (final ) or measures out a finished action with a quantity (verb-: ).
Correct
Say each one out loud before moving on. The audio is a reference pronunciation, not a model to imitate exactly — match the tone contour, not the voice.
下雨了，我们回家吧。下雨了，我們回家吧。
Xiàyǔ (fourth tone, falling) le, (neutral tone) wǒmen (third tone, dipping) huí (second tone, rising) jiā (first tone, high and level) ba. (neutral tone)···
It’s started raining — let’s go home.
我儿子今年八岁了。我兒子今年八歲了。
Wǒ (third tone, dipping) érzi (second tone, rising) jīnnián (first tone, high and level) bā (first tone, high and level) suì (fourth tone, falling) le. (neutral tone)···
My son has turned eight this year.
他不抽烟了。他不抽煙了。
Tā (first tone, high and level) bù (fourth tone, falling) chōuyān (first tone, high and level) le. (neutral tone)···
He doesn’t smoke any more.
Incorrect — Common mistakes
These sentences are wrong. They are printed here on purpose, each one paired with the repair and the reason, because the error you can recognise is the error you stop making.
Not quite
Incorrect sentence: 我每天六点起床了。
Correct
Correct sentence: 我每天六点起床。
Why: A habit is not news. 每天 marks something unchanged, and the change 了 has nothing to announce.
Not quite
Incorrect sentence: 他会说了汉语。
Correct
Correct sentence: 他会说汉语了。
Why: The change 了 closes the whole sentence, after the object. It never squeezes in between the verb and what follows it.
Not quite
Incorrect sentence: 外面下雨。
Correct
Correct sentence: 外面下雨了。
Why: Without 了 this is a general statement about rain. To report that it has just started, the sentence needs the final 了.
Compared with
Most errors with this pattern are not errors about this pattern — they are a neighbouring pattern arriving at the wrong moment. Read these side by side.
The two 了 sit in different places and do different jobs. Immediately after the verb, 了 measures out a finished action and normally comes with a quantity or a modifier: 我吃了两个包子, 他买了一本新书. At the end of the sentence, 了 announces a new situation: 我吃饭了 “I’ve eaten (now)”, 他不抽烟了 “he’s stopped smoking”. Two quick checks. If “now” or “already” fits the English, it is the final 了. If 不 or 没 appears anywhere in the sentence, only the final 了 is possible — 我不去了 is fine, 我没去了 never is. And in a short sentence with no object, one 了 does both jobs at once: 他走了.
了 for a completed action →Mini quiz
Question 1 / 3Total score: 0
Which sentence reports that it has just started raining?