Jimmy will never let me go.

吉米不会放我走的。

If your teenage son said to you: you never let me go anywhere! , and you're like: give me a break!

你哪也不让我去，你可以说：饶了我吧！

And I know you will never let me go to Manhattan again until I'm an adult.

我知道在我成年之前 你不会再让我去曼哈顿了。

She'd never let me go, at least not without a chaperone but Lady Edith will be in London and Lady Mary's not in the mood.

她肯定不会让我去的，至少也得找个女伴，但伊迪丝小姐要去伦敦，玛丽小姐又没什么心情。