Don't fight with your classmats at school.( fight 后中WITH）
Listen!Your mother is calling you.（ LISTEN 开头,后面要用进行时,calls -> is calling )
There is a hat and three T-shirts on the bed.( are -> is ,因为 a hat 是单数）
Jin has to play the piano on Sunday.（ have -> has ,主语三单）
I climbed moubtains with my classmates last weekend.（ climb -> climbed 一般过去时