一般规则是字母i在e前面，但在c之后除外：

　　believe sieve

　　但是：

　　deceive receipt

　　下面这些词例外，都拼写为ei：

　　beige feint heir reign their

　　counterfeit foreign inveigh rein veil

　　deign forfeit inveigle seize vein

　　eiderdown freight leisure skein weigh

　　eight heifer neigh sleigh weight

　　either height neighbour sleight weir

　　feign heinous neither surfeit weird