take to do还是 take do？

应该是take to do，最常见的就是take sb. to do sth.

1、For example, suppose an estimated value of the time it will take to do a task is 3 months.例如，假设完成一个任务所花费的估计时间值是3个月。

2、Piece of cake it will take to do what you asked. I'll start the job when the next commercials.当广告开始的时候我将做你要我做的事。