知识讲解与练习：1. used to do sth. be used to doing sth.be used to do sth.be used to doing sth 表示习惯做某事，to后的动词用-ing形式；be used to do sth.表示被用来做某事，to后的动词是动词原形；used to do sth.表示过去常常做某事。Im used to getting up early. 我习惯早起。The wood is used to build houses. 木头被用来建房子。I used to get up at five in the morning. 我过去经常在早上5点起床。2. arrive, get和reach表示“到达”时的区别arrive in后加名词（大地方）；arrive at后加名词（小地方）；get to后加地点名词；reach是及物动词，后面可直接跟地点名词。We arrived at the village at six in the afternoon.我们下午6点到达了那个村庄。Whe
