我想当老师用英文怎么说写

"to be a teacher" 的英文表达方式是 "to teach".

来源: 这是一个常用的英语动词，表示教学的意思。

例句:

"I want to be a teacher" 可以说成 "I want to teach."
"He is a teacher" 可以说成 "He teaches."
"She has always dreamed of being a teacher" 可以说成 "She has always dreamed of teaching."

其中第一句的"I want to be a teacher" 是一个表示意愿的句子, 第二句 "He is a teacher" 是一个现在时的状态句, 第三句 "She has always dreamed of being a teacher" 是一个过去的愿望句.