我十二岁了。

I'm twelve years old.

I'm twelve.

I am 12 years old.

I am twelve years old.

Source: Tatoeba

Sentence Composition

1 我 wǒ
  1. I
  2. me
  3. my
=2 十二 shíèr
  1. twelve
  2. 12
=2 十二 shí'èr twelve; 12
=3 岁 suì
  1. variant of 歲 suì, year
  2. years old
=3 岁 suì
  1. classifier for years (of age)
  2. year
  3. year (of crop harvests)
=4 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=4 了 liǎo
  1. to finish
  2. (used with 得 dé or 不 bù after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget")
  3. (literary) (usually followed by a negative such as 無 wú or 不 bù) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of 瞭 liǎo)
=4 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=4 了 liào unofficial variant of 瞭 liào