英语语法分析

I let him teach mathes for me.

我让他教我数学。

More importantly, I decide to teach the child mathes and English in person during my summer vacation, which will surely be more beneficial to the child.

更重要的是，我决定在暑假中亲自教这个孩子数学和英语，这样肯定对孩子更有益处。