請(qǐng)看下面一題:I’m learning _________ a cake. Can you explain _________ one?
A. to make, to make??????????????????????????????????
B. how to make, to make
C. to learn, how to make????????????????????????????
D. making, making

表示“學(xué)習(xí)做某事”可用 learn to do sth,也可用 learn how to do sth,即其中的 how 可用也可省略;但要表示“解釋或說(shuō)明做某事”,英語(yǔ)習(xí)慣上說(shuō)” explain how to do sth,而不說(shuō)explain to do sth。所以此題的最佳答案是C,有的同學(xué)之所以漏掉其中的 how 主要是因?yàn)闈h語(yǔ)中可以省略相應(yīng)的“如何”之意。注:以下各例中不定式前的 how 也不宜省略:He knows how to play the piano. 他會(huì)彈鋼琴。He showed her how to swim. 他教她游泳。We never discovered how to open the box. 我們一直未發(fā)現(xiàn)如何打開(kāi)這個(gè)盒子。Soon you’ll find out how to drive a car. 不久你就會(huì)學(xué)會(huì)開(kāi)車(chē)的。