I saw him ( )basketball on the playground jI saw him ( )basketball on the playground just now.为什么中间要填play?不是playing或是三单?

this is the man_____last nightAwhom I saw him Bwho I saw Cwhich I saw Dwho I saw him i saw him ____(walk)into the I saw him go out just now. I saw him ____ into that room. I saw him in the street是什么意思 I saw him go 什么 the classroom I saw him dancing.改为被动语态 i saw him yesterday改为否定句 I never saw him again翻译 I saw him go out.为什么不能写I saw him went out I saw him yesterday afternoon=I saw him in the afternoon yesterday吗 I saw him before going home.的同义句I saw him ___ ___ ___home. I saw saw saw i saw him walk into the next room被动语态 I saw him yesterday afternoonA playing soccerB play soccer I saw him reading/read just now为什么? I saw him ___ just now.填leave还是left I saw him to go out to play改错