be careful 后面加什么啊到底..

1.[对…]小心的,谨慎的[in,with]
He is in his speech [with his words].
他发言 [措词] 很小心
2
a.小心[注意] (不要…) 的
Be not to drop the vase.
注意不要把花瓶掉了
b.小心…的,注意…的
Be that you don't drop the vase.
注意不要把花瓶掉了
c.小心[…]的,注意[…]的 [about,as to,of]
Be (of) what you're saying.
小心你说的话
You must be how you hold it.
你必须注意拿它的方法
d.[对…]慎重的,小心的[in]
I shall be (in) deciding what to do.
我会慎重决定该做什么
e.小心 […的使用,处理] 的,注意[…]的[with]
You should be with that knife.
你要小心使用那把小刀
f.注意[…]的,注重[…]的[of,about]
He is about his appearance.
他很注重自己的外表
Be of your health.
注意你的健康; 请多保重
3 细心的,仔细的,彻底的
work [a examination]
细心的工作[检查]
4 (英口语) [对于金钱] 吝啬的,小气的[with]
She is with her money.
她用钱总是精打细算

不加啊，be careful 已经很完整了