Friend of mine was involved with this really scary dude.我的朋友和一个非常渣的家伙在一起

involve with涉及, 牵涉

He was deeply involved with the anti-drugs crusade.

他深深地涉入了反毒品运动。

You're too emotionally involved with the situation.

你在这件事上感情投入太多了。

She couldn't do it, so I stepped in.她没法分手，所以我介入了

step in走进； 介入； 干预； 伸脚穿入

I asked him why he didn't step in and help stop the argument.

我问他，为什么他不进行干预，制止这场争论。

The enemy got a chance to step in.

敌人乘虚而入。

they didn't want to deal with it themselves.那些人不想自己处理这种事

deal with讨论；处理，对付； 涉及

I have a huge pile of letters to deal with.

我有一大堆信件要处理。

Many movies deal with commonplace themes.

许多电影的主题很平庸。