李老师在这所学校任课已经十年了。

Mr. Li has been teaching at this school for ten years.

李老师不遗余力地教导我。

Mr. Li spared no effort to teach me.

校长把李老师捧上升（九重）天。

The principal flattered Mr. Li to the nines .

汪老师将代替李老师给我们上英语课。

Mr. Wang will replace Mr. Li to give us English lessons.

李老师病了，杨老师将代他来给我们上这堂课。

Mr. Li being ill, Miss Yang will give us this lesson instead.

下课以后，李老师把他留在教室里。

After class, Mr. Li kept her in the classroom.

李老师写一些救火规则防止人员受伤。

Mr. Li write some fire rules to prevent people injuring .

哇! 好大的萝卜. 这是根吗, 李老师?

Wow! The turnip is so big. Is this a root, Mr. Li?

李老师花很多时间帮助他的学生学英语。

Mr. Li spends a lot of time (in) helping his students with their English.

请大家以后叫他李老师，接着他就开始点名。

Ask everybody to call him Mr. Li later, then he begins to call-over .