I read in a book that we have a short - term memory .这句话是定语从句吗?We can still remember things that happened a long time ago .这句话也是定语从句吗?

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Ireadinabookthatwehaveashort-termmemory.这句话是定语从句吗?Wecanstillrememberthingsthathappenedalongtimeago.这

I read in a book that we have a short - term memory .这句话是定语从句吗?We can still remember things that happened a long time ago .这句话也是定语从句吗?
I read in a book that we have a short - term memory .这句话是定语从句吗?
We can still remember things that happened a long time ago .这句话也是定语从句吗?

I read in a book that we have a short - term memory .这句话是定语从句吗?We can still remember things that happened a long time ago .这句话也是定语从句吗?
第一个确实不是定语从句.但是是一个同位语从句.从语法上讲,that是关系代词,连接主句和从句,并且代表先行词在从句中充当句子成分,作宾语时可以省略,指物时可以用which代替.同位语从句里that不作成分只是连词,不能省略,不能用which代替.
第二个为定语从句.显然了.
语法书里从句那一章会区分定语从句和同位语从句的区别.找一本看看就知道了.

第一句不是定语从句,因为句中没有先行词的,是一个宾语从句,that后面作read的宾语。
第二句是定语从句,先行词是things,that后世修饰先行词的