Your school lag is very nice may l have a look?回答

Sure.(或Certainly) Here you are.

Yes, certainly.

of course,why not

Your school lag is very nice may l have a look?
楼主你好,我是英语专业学生。我想是BAG 你打错了
是书包的意思
你的书包很漂亮，我可以看看么？
回答：yes,you may .

may i ……
-yes, you may/can 或者sure, go ahead 等等，看情况定．一般来说，用you can 不多．
-no, you can't/mustn't. 或者no ,please don't

-could i……
-yes , you can/go ahead
-no, you can't /please don't, you'd better not

-must i ……
-yes, you must.
-no, you needn't/don't have to.

-need i ……
-yes, you need. /yes, please (do)
-no, you needn't.

我是王伟玉，给我最佳吧，我在你家告诉你