I was always wondering, what is the difference between 饭，菜， 食 and 餐 . Basically all mean food. But I know those are sometimes used in a diffetent curcimstances. What is then the most common word for ...
These characters all mean "to attack" or "to invade", but what are the differences between them? When should one be used and not the others?
I think they both mean "to go" -- is that right?
It seems like both 为 and 是 mean "to be". In which cases is one used but not the other? Is it something like the difference between "estar" and "ser" in Spanish and Portuguese? (In the sense that one ...