Soil liquefaction:主句主语
is:系动词
the process:主句表语
by which the strength or stiffness of soil is weakened by an event like the shaking of an earthquake:定语从句,修饰process。其中which是关系代词,因为是formal Enghlish, 介词by被移到了从句的开头并放在关系代词的前面。
the strength or stiffness of soil:从句的主语
is weakened by an event like the shaking of an earthquake:从句的谓语,是被动语态。其中by an event表示动作的执行者,like the shaking of an earthquake:介词结构在从句中作方式状语。
aiting for you,我们把句子还原就变成了:waiting for you is no use。waiting for you 是动词开头,而后面也有动词be ,所以这里用ing形式,到后来,这种形式变成了固定形式,也就是It no use doing sth做某事没用。这样一看,is就是谓语,no是形容词,没有,use这里是名词,用处,no 是定语 use 就是宾语