帮忙用英语翻译几个句子：（1）李老师年开始任教,工作一直很努力,曾多次受到表扬.（2）他知道丰富,...

1、Li is working hard ever since he began to teach,and had been praised several times.
2、He knows a lot and teaches well.His classes is interesting.The students like attending his calss.
3、He has