为什么有些单词前要加to 如mu mother asks me to get some water for her

为什么有些单词前要加to 如mu mother asks me to get some water for her My mother often asks me to help her do some wasking 为什么这里用me tom has to get some water for his mother 对 get some water 提问 1.Tom has to get some water for his mother(对get some water提问 连词成句get go to water for some me my mother asks me to help her clean the room my mother asks me to wait ( ) her ( )the bus stop. the doctor asks me ( )drink more water. in for to Mother asks me ____some tomatoes for her. 用to buy或 to buys填空：Her mother asks her ( ) some cakes. Would you like to get me some water. i enjoy sleeping late,but my mother always asks me to get up