nor, hardly, in no way, little, scarcely, barely, seldom, never, no more, no longer, not, not only, no sooner, not only... (but also), not until... 等具有否定意义的词或词组位于句首，句子用部分倒装。
Barely does he have enough money to live on.
Not only did he complain about the food, but he also refuse to pay for it.
Neither did I know it, nor did I care about it.
No sooner had I got home than it began to rain.
Not until twelve o'clock did she go to bed last night.
Not only are liver transplants never rejected, but they even induce a state of donor-specific unresponsiveness in which subsequent transplants of other organs, such as skin, from that donor are accepted per*nently.
Only in this way can you solve this problem.
Only after repeated failures did he realize the importance of cooperation with others.
Only in the case of the February Revolution do we lack a useful description of participants that might characterize it in the light of what social history has taught us about the process of revolutionary mobilization.
(3) so/such...that 结构中的so或such位于句首可以构成倒装，表示强调so /such 和that之间的部分
So busy is he that he can not go for a holiday.
Such a wonderful job did he do that he won our respect.
Should I win the lottery, I would buy a car.
正常语序: If I should win the lottery, I would buy a car.
Were he to tell us everything, we could try to solve his problem.
正常语序：If he were to tell us everything, we could try to solve his problem.
Nevertheless, researchers of the Pleistocene epoch have developed all sorts of more or less fanciful model schemes of how they would have arranged the Ice Age had they been in charge of events.
名词：The baby is adorable.
代词：He always keeps his promise.
The+形容词：The young are mostly ambitious.
不定式：To study abroad is my greatest desire.
动名词：Collecting stamps is one of his hobbies.
主语从句：That he doesn’t study *kes me angry.
(1) Deeply involved with this new technology is a breed of modern businesspeople who have a growing respect for the economic value of doing business abroad.
句首是分词短语deeply involved with this new technology不能作主语，真正的主语是a breed of modern businesspeople who...到句末。
(2) Most striking among the *ny asymmetries evident in an * flatfish is eye placement: before *turity one eye migrates, so that in an * flatfish both eyes are on the same side of the head.
句首是形容词短语Most striking among the *ny asymmetries evident in an * flatfish，谓语是is，真正的主语是eye placement。
(3) At the core of this debate is chair*n Gerald Levin, 56, who took over for the late Steve Ross in 1992.
句首是at引导的方位短语，不能作主语，真正的主语是chair*n Gerald Levin, 56, who took over for the late Steve Ross in 1992.