将此句变为被动语态,每空一词.I saw them play football on the playground .They -_英语解答

将此句变为被动语态,每空一词.I saw them play football on the playground .They ------ -------- --
将此句变为被动语态,每空一词.
I saw them play football on the playground .
They ------ -------- ------- ------- football on the playground

人气：484 ℃　时间：2019-08-19 23:28:55

解答

They were seen to play football on the playground
主语+谓语动词+动词被动语态+to do sth