I hate it when they talk with their mouths full of food.我讨厌他们满嘴食物时说话。（when引导时间状语从句，it是代词，代指这种情况） I hate it that I love you.我讨厌我爱你。（it是形式宾语，that引导宾语从句）He will have it that our plan is really practical.他会认为我们的计划确实可行。We...