Jim wants a pair of trousers/pants.
裤子是复数,不可以用a,trousers和pants都可以表示裤子.a pair of 是一条的意思.
Tom wants to play basketball.
Jim wants a trousers
Tom wants to play basketball
注意want 加“s”
Jim want a trousers
Tom want to play basketball
Jim wants a trousers.
Tom wants to play basketball.