托福寫(xiě)作：其實(shí)你一直在錯(cuò)用spend

　　spend something on something

　　spend something in doing something(這里的in可以省略)

　　但在長(zhǎng)期的教學(xué)實(shí)踐中，我發(fā)現(xiàn)有不少小伙伴仍然在用spend something on doing something，如

　　In order to get good grades, we should spend a massive amount of time on studying our subjects. ×

　　這顯然是把on something和in doing something混用了，有“司馬光砸光(缸)”之嫌。盡管有極少數(shù)詞典說(shuō)spend something on doing something也正確，但是絕大多數(shù)詞典或權(quán)威教材不這么認(rèn)為。所以，為了保險(xiǎn)起見(jiàn)，還是應(yīng)該堅(jiān)持用spend something on something或spend something in doing something，來(lái)看兩個(gè)例子：

　　【例】spend a lot of time on a project 花很多時(shí)間進(jìn)行某項(xiàng)目/spend a lot of time (in) explaining a plan 花很多時(shí)間解釋某方案

　　(例句來(lái)源：Oxford Advanced Learner’s English-Chinese Dictionary)

　　所以，剛才的句子應(yīng)該這樣寫(xiě)：

　　In order to get good grades, we should spend a massive amount of time on our subjects. √

　　或

　　In order to get good grades, we should spend a massive amount of time in studying our subjects. √

　　若一篇文章中spend出現(xiàn)的次數(shù)較多，那么可以用expend來(lái)替換，expend和spend基本同義，使用方法也基本相同，但比spend更加正式，會(huì)使用的考生也較少，如果使用得當(dāng)，可以給自己的文章增添一點(diǎn)高大上的氣息。來(lái)看兩個(gè)例句：

　　【例】We’ve already expended too much energy on this project. 我們已經(jīng)在這個(gè)工程上耗費(fèi)了太多的精力。

　　(例句來(lái)源：MacMillan English Dictionary – American)

　　【例】Manufacturers have expended a lot of time and effort trying to improve computer security. 制造商們已經(jīng)花費(fèi)了很多時(shí)間和精力來(lái)盡力改善計(jì)算機(jī)安全。

　　(例句來(lái)源：Longman Dictionary of Contemporary English)