41. It takes sb sometime/money to do sth . 花费某人多长时间做某事(常考)

It takes me an hour to walk there and back.

42. pay …for… cost spend…on….. it take …to do sth 花费

He paid for it out of his own pocket.

43. It's best for sb to do sth. 对某人来说做某事是最好的

It's best for you to do more exercise.

had better do sth 最好做某事(注意had没有时态和人称的变化，better后接动词原形)

You had better go to the school.

44.It's time for sb to do sth 是某人做某事的时候了

It's time for us to have dinner.

45.keep (on)doing sth 坚持做某事(常考)

John always kept (on) asking questions.

keep sb doing sth 让某人做某事(常考)

Don't keep me waiting.

keep sbfrom doing sth 阻止某人做某事(常考)

He keeps her from cutting the tree.

keep sb/sth +adj 使某人保持……的状态

Washingyour hands keeps you healthy.

46.learn to do sth 学做某事 Ilearn to play football.

learn sth from sb 向某人学习

I learn the spirit from him

47.like to do/doing sth 喜欢做某事 like sb to do sth 喜欢某人做某事

She likes swimming./She likes to swim this afternoon.

48.need to do sth/ need doing sth/need to be done　需要做某事

The garden needs to be watered. / The garden needs watering.

49. prefer to do sth rather than do sth 宁愿……而不愿……(常考)

I would prefer to spend the weekend at home rather than drive out.

prefer doing sth to doing sth 喜欢做……胜过做……

I prefer reading books to going shopping. 比起购物来，我更爱读书。

preferto do sth 喜欢(爱)做某事

50. refuse to do sth 拒绝做……

I refuse to answer that question.