因為他遲到了，所以我很生氣。

I was angry because he was late.

Source: Tatoeba

Sentence Composition

1 因為 yīnwèi
  1. because
  2. owing to
  3. on account of
2 他 tā
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)
3 遲到 chídào to arrive late
=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 无 wú or 不 bù) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of 了 liǎo)
=4 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=4 了 liào unofficial variant of 瞭 liào
5 所以 suǒyǐ
  1. therefore
  2. as a result
  3. so
  4. the reason why
6 我 wǒ
  1. I
  2. me
  3. my
7 很 hěn
  1. very; quite
  2. (also, often used before an adjective without intensifying its meaning, i.e. as a meaningless syntactic element)
8 生氣 shēngqì
  1. to get angry; to be furious
  2. vitality; liveliness