This can be a complete sentence.

这可以是一个完整的句子。

Please say again in a complete sentence.

请再完整地说一遍。

She made a complete sentence be difficult.

她造完整的句子有困难。

Each answer you write must be a complete sentence.

你写的每一个答案都必须是一个完整的句子。

"I don't think that was a complete sentence," she said.

“我觉得这不像是一个完整的句子。”她说。