pay attention to one's teacher
注意听老师讲课

-Pay more attention to your teacher when having a class.
-上课的时候你应该注意听老师讲课。

-I want to, but I can't concentrate on the subject.
-我也想啊，但我就是没法把注意力集中在课上。

flock around one's teacher
聚集在老师周围

-The children flocked around their teacher.
-孩子们都聚集在老师周围。

-They were attracted deeply by the story the teacher told.
-他们被老师讲的故事深深吸引了。

explain something to one's teacher
向老师解释某事

-I was absented from class yesterday because my mother was ill.
-我昨天没来上课是因为我妈妈病了。

-You should have explained that to your teacher.
-你应该向老师解释这事的。

buy one's teacher a present
给老师买礼物

-Tomorrow is Teachers' Day.
-明天是教师节。

-I suggest you buy your teacher some presents. What do you think?
-我建议你给老师买些礼物，你说呢？

present flowers to one's teacher
给老师献花

-Did you attend the graduation ceremony yesterday?
-你昨天参加毕业典礼了吗？

-Sure. It was moving that students presented flowers to their teachers.
-当然，学生们给老师献花的场景真让人感动。

fall short of the expectations of one's teacher
辜负老师的期望

-I think the principal's speech encouraged me deeply and doubled my confidence. The bitterness and tiredness of the past are now transformed into aspiration for the future.
-我觉得校长的演讲深深激励了我，让我信心倍增。过去的那些痛苦艰辛如今都转化成了对于明天的向往。

-I have the same feeling. I thought that I would do my best to study well in the future thus not to fall short of the expectations of my teachers and my parents.
-我也有同样的感受。我想我以后要努力学习，那样才不辜负老师和父母的期望。

*live up to / come up to / meet one's expectations 不辜负某人的期望

stand well with one's teacher
深受老师的好评

-John stands well with his teachers.
-约翰深受老师的好评。

-Yes. He's a student with excellent morals and academic skills, so he's popular with all his classmates and teachers.
-是啊。他是个德才兼备的学生，所以很受同学、老师的欢迎。

get a rap on the knuckles from the teacher
受到老师的批评

-He got a rap on the knuckles from the teacher for not finishing his homework.
-因为没完成作业，他被老师批评了。

-He deserved it. He spent the whole night on the Internet.
-活该，谁让他整晚都在上网。

*(give somebody/get) a rap on/over/across the knuckles - (to give somebody/receive) strong criticism for something （给某人以／受到）严厉谴责，厉声训斥

respect one's teacher
尊敬老师

-We should respect our teachers. You shouldn't have answered your teacher back in class.
-我们应当尊敬老师，你不该在课上同老师顶嘴。
-It was an impulse. I couldn't stand her.
-那是一时冲动，我实在受不了她。

acknowledge one's debt to one's teacher
感谢老师

-Congratulations! You finished top in the final examination.
-恭喜恭喜！你在期末考试中取得了第一名。
-Thank you very much. I don't know what to say. I want to acknowledge my debt to my teacher first.
-谢谢，我都不知道说什么了。首先我得感谢老师。