1.“ 在when,while,as等引導(dǎo)詞引導(dǎo)的時(shí)間狀語(yǔ)從句中,如果主句主語(yǔ)和從句主語(yǔ)都發(fā)生在過(guò)去,持續(xù)性動(dòng)詞用過(guò)去進(jìn)行時(shí),短暫性動(dòng)詞用一般過(guò)去時(shí).”這句話的意思是,比如說(shuō),昨天Betty的媽媽在做飯,這時(shí)候Betty到家了.“Be...1.首先，如果這是一個(gè)同位語(yǔ)從句，那么 " we compete with others to go beyond ourselves "本身就可以概括為一個(gè)" race "，而事實(shí)上它只是修飾" race "，給我們更詳細(xì)地解釋"race"，它本身與"race"是兩個(gè)不同的概念。2.“ computers can recognize human voices 它本身就是一個(gè)" idea ",，它與"idea"是一個(gè)概念，是同樣的性質(zhì)。比如說(shuō)你可以說(shuō) Computers can recognize human voices is an idea. 卻不能說(shuō) We compete with others to go beyond ourselves is a race.這樣說(shuō)你能明白嗎？