这里是系表结构的过去形式吗?

问题描述:

这里是系表结构的过去形式吗?
The 13 American colonies declared that they were independent from Britain.
13个美国殖民地宣告他们已从英国独立.
这里they were independent.是不是主系表,结构,的过去形式.

是的.
they是主语
were是谓语(系动词)
independent是表语
后面整个是做declared的宾语,是个宾语从句.