Using passive voice:Mary seems to like John very much.

改被动语态，谢谢大家！~

Mary seemed to be like John very much

祈使句是不能用动名词（v+ing)形式开头的
这里rewrite开头是祈使句，后面用到的v+ing是对这个祈使句的补充说明，即为动名词短语
“Rewrite the following sentences as required”按照要求改写以下句子，而这里没有提出要求（名词），所以以下用动名词短语形式作为对"要求"的描述

变为被动态:

Mary seems to be liked very much by John.

楼主的句子有个小错误，to be liked 要用过去分词。

不完全对。
like需要变成过去分词。构成被动语态。
勤学好问，天天进步！
加油！你是最棒的！

被动语态变化规则有三步：
1，寻找主谓宾
2，宾变主，主变宾，谓语动词变被动。
3，注意时态与主谓一致。
掌握了这三步，变被动语态就很容易了。这句话为：John seems to be liked by Mary.

Using passive voice: Mary seems to like John very much.
使用被动语态：玛丽似乎很喜欢约翰。

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盈江县13163486469： passive voice是什么意思 - ？
氐莺奥沙： passive voice n.〔语〕被动语态 被动式;被动态;被动语气 例句1.These sentences can be changed into passive voice.这些句子能变成被动语态.2.Rewrite the sentences using the Passive Voice.用被动语态改写句子.3.We should translate this...