动名词相当于名名词,在句中作主语,宾语或表语,也可作定语,作定语时表示用途
不定式可充当主,宾,表,状,定,补语.表示将来或目的
例:Teaching English is my job.(Teaching English作主语,表一般情况,不表 将来)
To clean the room is your job.(To clean 作主语,表将来)
Give me some food to eat.(to eat 作定语,表将来)
Give me some drinking water.(drinking作定语,表作用,可喝的水)