The builders are busy build tall buildings.(改错）
问题描述：
The builders are busy build tall buildings.(改错）
答
The builders are busy building
tall buildings.因为be busy doing sth. 忙着做某事 是固定短语。
“英语教师团队真诚为您解惑
答
build改为building。
现在时啊。
答
朋友
有个固定短语 be busy doing sth 是忙于做某事
所以build要改为building
答
The builders are busy building tall buildings
be busy doing sth. 忙着做某事
答
build-building
be busy doing sth固定短语,忙于做.
祝你进步
答
be busy doing
building
答
有短语be busy doing something,再者用一般分析
因为有are,所以是现在进行时，所以用building