初中重点知识点11-15

11. ask sb. for sth.    向某人请求某物   

12. ask sb. to do sth. 叫某人做某事 ;

ask sb. not to do 叫某人不要做某事 ; 

13. at the age of  在(主语)……岁时   

14. at the beginning of …      ……的起初；……的开始 

15. at the end of +地点/+时间    最后；尽头；末尾   

in the end = at last = finally