usually状语
we主语
don't realize 宾语
we don't realize (sth)until it is too late.这是主句
这里的sth就是宾语,而宾语可以是句子也就是宾语从句 how important nature is to us ,is是宾语从句的谓语成分,因为该句子是宾语从句所以用陈述语序而不用疑问语序
usually状语
we主语
don't realize 宾语
we don't realize (sth)until it is too late.这是主句
这里的sth就是宾语,而宾语可以是句子也就是宾语从句 how important nature is to us ,is是宾语从句的谓语成分,因为该句子是宾语从句所以用陈述语序而不用疑问语序