________ you eat the correct foods ________ be able to keep fit and stay healthy.
A.Only if; will youB.Only if; you willC.Unless; will youD.Unless; you will
A

試題分析:考察only的倒裝。部分倒裝句中考查較多的是否定詞或者半否定詞放在句首,要使用部分倒裝的形式。當only放在句首,強調(diào)狀語的時候也要使用部分倒裝的形式。要注意當only不強調(diào)狀語的時候,就不需要倒裝句了。要特別注意only后面的狀語從句不需要倒裝,倒裝的是主句。本句if后面的條件句就不需要倒裝,故A正確。
點評:部分倒裝中考查較多的有:(1) 含有否定意義的詞never,seldom,little. hardly,not,scarcely,nowhere,by no means(決不)等置于句首時。(2)以only修飾作為狀語的副詞、介詞短語或從句,且放在句首時!∽⒁猓簅nly 修飾狀語從句放在句首時,狀語從句不需要倒裝,只能倒裝主句部分。(3)當so置于句首意為“也如此”,neither,nor置于句首意為“也不”時。當so表示對前句內(nèi)容的肯定和附和,譯作“確實,正是”時,用自然語序。(4)當not only…but also, so/such…that, not… until, no sooner… than, hardly… when等連詞置于句首時。(5)在as引導的讓步狀語從句中(名詞/形容詞/副詞/動詞+as+主謂結(jié)構(gòu))。(6)虛擬語氣的條件狀語從句省去 if時,須將were,had,should提到句首構(gòu)成倒裝句。(7)頻度副詞often, always, once, now and then, every other day, many a time等放在句首時。(8)為了使句子保持平衡,為了強調(diào)表語或為了使上下文緊密銜接時,常使用倒裝語序。
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