vi.

1. 抱怨，發牢騷；訴說（病痛等）[（+to/about/of）]
   I've really got nothing to complain of.

   我確實沒有什麼可抱怨的。

   He complained to me about the food.

   他向我抱怨伙食不佳。

2. 控訴，投訴[（+to/about/of）]
   He complained to the police of the boys stealing his apples.

   他向警方控告那些男孩偷他的蘋果。

vt.

1. 抱怨；控訴[Y][+that]
   He complained that the exam was too hard.

   他抱怨考試太難了。

v.

1. express dissatisfaction or annoyance.
2. (complain of) state that one is suffering from (a symptom of illness).