teach (sb) a lesson只有“给某人一个教训”的意思.
而give (sb) a lesson有两种理解。
一是本意“（给某人）授课”，二也可以引申为“给某人一个教训”。⚠️教训区别不大

I’ve got to go home./get going./go to class.
I've got to do something是主观上有事要做
而I have to do something是客观上的,与外界因素有关系【不得不】

I gotta go= I have got to go
美语口语．

1.I've got to do sth.（ArE)=I have to do sth.(BrE)
美语中喜欢加got
Don't tiptoe around my feelings.
我只是想要帮你
Well, I'm just trying to help.
我知道 谢谢你
I know. Thank you.
不客气 我要回去工作了 祝你好运
Sure. I gotta get back to work,
If she wants to be in this picture, she's gotta be on that boat.
她不想演这部电影
She doesn't wanna be in this picture.
-玛琳不干了 -她不干了?
-Maureen pulled out. -She pulled out?
Yeah, but we're not shooting in Singapore
look her in the eye and lie
teach me a lesson.
treasure hunt.寻宝游戏
假装她自己死掉，让我背黑锅
Fakes her own death, frames me for it.