:Li Hui spent a lot of time playing all kinds of ball games.(保持原句意思）
问题描述：
:Li Hui spent a lot of time playing all kinds of ball games.(保持原句意思）
答
It took Li Hui a lot of time to play all kinds of ball games.
It 是形式主语， to play all kinds of ball games. 是不定式作真正主语。
答
It took Liu Hui a lot of time to play all kinds of ball games.
答
Li Hui spent a lot of time (upon或on) all kinds of ball games.
spend 时间 upon/on sth.在什么事情上花费多少时间
spend 时间 (in) doing sth.在做什么事情上花费多少时间