如果您想表示老师管的很严，可以使用以下表达方式：
老师很严格：
The teacher is very strict.
这位老师很严格。
老师很严肃：
The teacher is very serious.
这位老师很严肃。
老师很严厉：
The teacher is very stern.
这位老师很严厉。
老师很严谨：
The teacher is very exacting.
这位老师很严谨。
老师很严要求：
The teacher is very demanding.
这位老师很严要求。
这些表达方式均表示老师管的很严，意思略有差别。"Strict" 指的是严格的、严谨的，"serious" 指的是严肃的、认真的，"stern" 指的是严厉的、严苛的，"exacting" 指的是严谨的、苛刻的，"demanding" 指的是严要求的、苛刻的。
例如：
My math teacher is very strict. She never allows any mistakes in our homework.
我的数学老师很严格。她从不允许我们的作业有任何错误。
The Engpsh teacher is very serious. He always expects us to pay attention in class and participate actively.
英语老师很严肃。他总是希望我们上课要集中注意力并积极参与。
The science teacher is very stern. He doesn't tolerate any disruption or disrespect in his class.
科学老师很严厉。他不容忍班上的任何打扰或不尊重。
The history teacher is very exacting. She requires us to do a lot of research and write detailed essays.
历史老师很严谨。她要求我们做很多研究并写详细
老师很严格：
The teacher is very strict.
这位老师很严格。
老师很严肃：
The teacher is very serious.
这位老师很严肃。
老师很严厉：
The teacher is very stern.
这位老师很严厉。
老师很严谨：
The teacher is very exacting.
这位老师很严谨。
老师很严要求：
The teacher is very demanding.
这位老师很严要求。
这些表达方式均表示老师管的很严，意思略有差别。"Strict" 指的是严格的、严谨的，"serious" 指的是严肃的、认真的，"stern" 指的是严厉的、严苛的，"exacting" 指的是严谨的、苛刻的，"demanding" 指的是严要求的、苛刻的。
例如：
My math teacher is very strict. She never allows any mistakes in our homework.
我的数学老师很严格。她从不允许我们的作业有任何错误。
The Engpsh teacher is very serious. He always expects us to pay attention in class and participate actively.
英语老师很严肃。他总是希望我们上课要集中注意力并积极参与。
The science teacher is very stern. He doesn't tolerate any disruption or disrespect in his class.
科学老师很严厉。他不容忍班上的任何打扰或不尊重。
The history teacher is very exacting. She requires us to do a lot of research and write detailed essays.
历史老师很严谨。她要求我们做很多研究并写详细