A:think of
1.You always think of everything!; Have you thought of the cost involved?考虑
2.I couldn't think of her name when I met her at the party.想（起)
3.I would never think of being rude to her; He couldn't think of leaving her.想法
4.What do you think of his poem?想法
5.He was thinking of taking legal action against her.考虑
B.think about
1.I was thinking about my mother.想念
2.What do you think about his suggestion?认为