國中講義說:當主詞為單數,要用單數動詞;若兩件事情接在一起,則用複數動詞.例如:To mop the floor and to wash the dishes are not easy for her. 或 Watching TV and playing computer are fun. 和奇諺老師的線上課程__一致性 重點2 其中一個例句...... To love and to be loved is difficult. 有些矛盾耶?!