“语法一致”是指，句子的主语和谓语在语法形式上一致。
He goes to school early every morning.他每天早晨很早去上学。
They go to school early every morning.他们每天早晨很早去上学。
The boy is playing basketball now.这个男孩正在打篮球。
These boys are playing basketball now.这些男孩正在打篮球。