一、考查when与which的区别当先行词为表示时间的名词时,如果从句中缺少主语、宾语或表语,则用关系代词which或that,在非限定性定语从句中只能用which,关系代词在从句中作宾语时可以省略;如果从句中不缺少主语、宾语或表语,先行词在从句中作状语,则填when。There are moments when I forget all about it.总有些时候我会记不起这件事。During the weeks which/that followed,she heard several times from Laura.在接下来的几周里,她收到了劳拉的几封信。 First, examine the difference between when and where When the antecedent is the nouns of time, if the clause lacks a subject, object, or table of speech, then use the relative pronoun that or that, which can only be used in non-restrictive attributive clause, the relationship Pronouns in the clause as an object can be omitted; if the clause does not lack the subject, object or table language, antecedent in the clause as an adverbial, fill when. There are moments when I forget all about it. There are times when I will not remember this. During the weeks which / that followed, she heard several times from Laura. Over the next few weeks she received several letters from Laura.