spend→spent→spent v 花费,主语是人
sb.+ spend +时间/钱+on sth spend on= pay for 支付 sb. +spend +时间/钱+(in) doing sth
He spends too much time on the computer games.
Remember to spend some time _with_ your loved ones, because they’re not going to be around forever.
pay →paid →paid v 支付,主语是人
sb.+ pay + 钱+for sth I pay 10 yuan for the book.— How much did you pay for this computer?
cost→ cost→ cost v 花费,主语是某物或某事 sth cost sb. +钱 某物花费某人多少钱
A new computer costs me a lot of money.
— Five hundred dollars.I bought a new sweater last weekend. It cost me 120 yuan. take→took → taken v 花费
It takes /took sb. some time to do sth. 做某事花费某人多长时间
It takes him 3 hours to do his homework.