Question

哪些情况两个动词之间没有to ？

Answer 1

let sb do sth中let是动词（一般作谓语），sb是动词let的宾语，do是宾语补足语，其它词跟let雷同。这些词的宾语补足语都不加to.使役动词的宾语补足语在主动语态中不加to，但变为被动语态是要加to.例如：The boss made the worker work all day.

The worker was made t...