这个句子中宾语从句的时态
上课回答概括大意的问题,我想说作者以他亲身经历为例,然后通过这个例子告诉我们网络是很有用的.
He took his experience as an example and then he used the example to tell us that the internet is very useful.
因为文章是以前写的,所以作者举例（took his experience as an example ）和使用这个例子（used the example ）都应该是过去时,但网络有用却不只是过去的事,应用一般现在时.可是这样,宾语从句的时态为一般现在式,主句为过去式,可以吗