Milton's language doesn't have the same kind of headlong rush that most declarative English sentences have.

弥尔顿的语言不像大部分英语陈述句一样,直接把意思说明白。

耶鲁公开课 - 弥尔顿课程节选

Also you can use the "There is" statement, to be a question by inverting it.

你也可以使用“There is”句型，将陈述句转换一下就可以变成问句。

There is 课堂 - SpeakingMax英语口语达人

This is a question, but it comes in the declarative form, too.

这是一个问句，不过是以陈述句的形式出现的。

耶鲁公开课 - 1945年后的美国小说课程节选

Also you can use " It seems" as a statement rather than a question.

你也可以将"It seems"作为陈述句使用，而非疑问句。

It seems 课堂 - SpeakingMax英语口语达人