in + 语言 I can introduce myself in Chinese.
I don't know how to say that in English.
How do you say this in French?
I can introduce myself in Spanish.
with + 工具
I write the article with my pen.
I brush my teeth with my toothbrush.
I store milk with the refrigerator.
I wash clothes with the washing machine.
I sweep the floor with a broom.
I cut the potatoes with a knife.
I peel the potatoes with a peeler.
I make juice with a juicer.
by + 方式
I go to school by school bus.
I go to Paris by plane.
I'm going to New York by train.