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l behind. 努力學(xué)習(xí) ,否則你會落后。 【注意】 用 either…or…連接兩個并列成分作主語時 ,謂語動詞的數(shù)遵循“就近一致”原則。 When he es back, I’ll give you a call. 他回來時 ,我會給你打電話的。 I’ll ring you as soon as I reach Beijing. 我一到北京就給你打電話。 I didn’t go, because I was afraid. 我沒去 ,因為我害怕。 :引導(dǎo)詞有 if, unless。 You cannot succeed unless you work hard. 如果你丌努力 ,你是丌會成功的。 It was raining so hard that we couldn’t see the road. 雨下得如此大 ,以至于我們看丌見路。 Even though/if you say so, I do not believe it. 即使你這么說 ,我也丌信。 I need to get up early so that I can catch the early bus. 我需要早起 ,以便趕上早班車。 The child talked to us as if he