to have enough money to buy or pay for something

买得起，能支付:

We can't afford to go on vacation this year.

今年我们没钱去度假。

I couldn't afford the rent on my own.

我单靠自己付不起房租。

How can she afford to eat out every night?

每天晚上下馆子她怎么能负担得起？

to have enough time to do something

有〔时间〕做某事:

Dad can't afford any more time off work.

爸爸没有办法再请假。

if you cannot afford to do something, you must not do it because it could cause serious problems for you

承担得起:

We can't afford to wait any longer or we'll miss the plane.

我们再也不能等下去了，否则会赶不上飞机的。

I can't afford to buy ( NOT can't afford buying / can't afford buy ) a car.

我买不起汽车。