When:首先(In the first/initial/original step; First of all = Firstly = initially = originally) What:要使用的主要材料是温水和糖(warm water, sugar) Where: 盛有酵母的容器(yeas...
when可作并列连词,常用于引导一个突然出现的动作,意为“那时/这时……”,此时句子的形式如下:1.Somebody was doing something when…; 2.Somebody was about/ going to do something when…; 3.Somebody was on the point of doing something when…; 4.Somebody had ...
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