1)当表示否定或基本否定的词或词组位于句首作状语时用倒装。这类词或词组常用的有：never,nowhere,seldom,rarely,little,hardly,scarcely,barely,notuntil,notonly,bynomeans,innotime,undernocircumstances,undernocondition,innoway,innocase,atnotime,onnoaccount等。
NowherecanIfindmylostwatch.
Undernocircumstanceshouldastudentcheatintheexam.
NotonlywasChurchillastatesman,butalsoapoet.
Note:当“nosooner…than”和“hardly/scarcely…when/before”位于句首时用倒装。该结构表示“一…就…”，在时态上主句一般用过去完成时，when或than引导的从句用一般过去时。
Hardly/ScarcelyhadIgothomewhen/beforethebellrang.
Nosoonerhadtheperformancebegunthanthelightswentout.
2)当here,there,then,thus,only,hence,little等副词位于句首，句中主、谓用倒装。
Thencametheordertotakeoff.
Thusarosethedivisionbetweenthedevelopedanddevelopingcountries.
4)分句以so,neither,nor,nomore等副词位于句首，表明前面句子中所说明的情况也使用于后面的句子时用倒装。
Copperisagoodconductor.Soaremanyothermetals.
Hedidn’tseethefilmlastnight,neitherdidshe.
