Only __________ one loses freedom __________know its value.
A.when, he doesB.when, does heC.what, he didD.that, did he
B

試題分析:根據(jù)句意可知:只有一個人失去自由時,他才能知道它的價值。
Only置于句首,主句部分倒裝,故選B
點評:本題重在理解意思,并掌握部分倒裝的常用形式。倒裝分完全倒裝和部分倒裝。
完全倒裝:
1.由地點和時間副詞引出的完全倒裝句:以地點副詞here, there和時間副詞now, then 開頭,后面的動詞是be, come, exist, fall, follow, go, lie, remain, seem, stand等,而主語又是名詞時,構(gòu)成完全倒裝句。eg :Up climbed the boy when his mother came.
2.表示運動方向的副詞或地點狀語置于句首,謂語表示運動的動詞且主語是名詞時使用完全倒裝
Out rushed a missile from under the bomber. 轟炸機肚底下竄出一枚導(dǎo)彈。   
注意:
在here, there引出的倒裝句中,當(dāng)主語是普通名詞時用完全倒裝句,但當(dāng)主語是代詞時,就要用部分倒裝句。
例:Here comes the postman!(郵遞員終于來了!注意實意謂語動詞位于主語之前。)
Here we are.(我們到了。注意系動詞位于主語代詞之后。)
部分倒裝:
部分倒裝即只把謂語的一部分(如助動詞、情態(tài)動詞等)放到主語前,或把句子的強調(diào)成分提前。
Nor did he let the disease stop him from living the kind of life he has always dreamt about(疾病沒有使他放棄過上夢想中的生活)
1) 以否定詞開頭的句子要求部分倒裝。注意下列句子中助動詞或情態(tài)動詞提前、甚至補充助動詞的用法:
例:Not until yesterday did little John change his mind.(小約翰直到昨天才改變了主意。)
In no country other than Britain, it had been said, can one experience four seasons in the course of a single day.(據(jù)說除了英國世界上沒有哪個國家能讓人在一天中感受到四季變化)
2) 以否定副詞開頭并加狀語放在句首的句子要求部分倒裝。這些否定副詞有barely, hardly, little, seldom, scarcely…… when, never, no sooner…… than, rarely, no more, not nearly, not only等以及only。
Only in the country can you learn the “true English”.
3)一些如scarcely……when, no sooner ……than, hardly……when引導(dǎo)的主從復(fù)合句主句要求使用過去完成式。
注意:在部分倒裝句中,只有助動詞、情態(tài)動詞或連系動詞to be可以置于主語之前,其它部分都要置于主語之后。
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