关于watch out for和watch out 的区别?还有protect.from doing.

watch out for
v. 戒备, 提防, 密切注意
例句与用法:
I said I should be sick, and that I must watch out for symptoms.
我说过我一定是有病了，我得留意一下症状。
The staff were asked to watch out for forged banknotes.
已经要求职员留意伪钞.
The police are watching out for the suspect.
警方正密切注意嫌疑犯的行动。
In the rush to go folkloric watch out for collision of cultures.
在民俗化的热潮中，要提防不同文化的冲突。
watch out
vt. 当心(提防)
例句与用法:
Watch out! There's a car coming.
小心! 汽车来了.
The staff were asked to watch out for forged banknotes.
已经要求职员留意伪钞.
Watch out here comes the law!
注意--警察来了!
Watch out!
留神!
But watch out you don't get them into trouble.
但要当心，不要给他们找来麻烦。
In the rush to go folkloric watch out for collision of cultures.
在民俗化的热潮中，要提防不同文化的冲突。
I advised them to watch out for slick spots on the sidewalk.
我叫他们当心人行道上路滑的地方。
英英解释:
动词 watch out:
be vigilant, be on the lookout, be on one's guard, be careful
同义词：watch, look out

watch out for戒备, 提防, 密切注意
watch out 密切注视,当心, 提防
为了保护。。。做些什么
做些。。。。是为了保护。。。

watch out for和watch out 均可表示戒备, 提防, 密切注意
只是当 watch out 后接名词时要用上 for
简单来说就是 watch out for+sth；watch out+句子或不加东西
（类于because 与because of的区别）
所以，watch out 可独立成句，watch out for 不可以
protect......from doing.....（保护……以免其受到……）

1.watch out for
密切注意
Watch out for a tall man in a black hat.
注意一个戴黑帽的高个男人。
2.Watch out
小心
Watch out -- There's a car coming.
小心!有车来了。

watch out for 后面可以加个东西
watch ot不可以
Watch out for the stone.当心石头
Watch out!当心!
保护.免遭.