Can " please " be used as a verb to mean " beg " or " ask " ?
No, it can't.
Yama posted:I mean, are these two sentences the same?
1) I begged him to help me.
2) I pleased him to help me.
No. Only the first sentence works. The second is ungrammatical. But you can say:
1a) I begged/asked him to please help me.
In (1a), we understand that the begging/asking involved the word "please."