do sth as a favour;ask a favour of sb ;do the favour to do造句

1、do sb.a favour 帮助某人（最常用的短语）
Please do me a favour.请帮我个忙.
Can you do me a favor?你能帮帮我吗?
2、ask a favour of sb.
I went to ask a favor of Lanlan for teaching me English.我去请兰兰教我英语.
3、as a favour帮个忙,作为一个好意.
As a favour,could you please send this letter for me.帮下忙,帮我寄一下这封信好吗?
As a special favour,I'll let you stay up late tonight.作为对你的特殊眷顾,今晚我让你晚睡.