当never, not , not until ,not only, hardly, hardly when(一... 就...), rarely(少), few, little,seldom(很少), neither, nor, by no means, on no account, under/in no circumstances, in no case, at no time, in no way, no sooner(一旦立即)等含有否定意义的词或词组放在句首时, 其后面的主谓用部分倒装语序。