1.used to(过去经常) 它表示过去常产/反复发生的动作或状态,现在不了。 (1)I used to be afraid of tigers.(我以前怕老虎) (2)He used to take a train to get to school.(他以前常坐火车上学) (3)Did you use to have lunch at home?(你以前经常在家吃午饭吗?) (4)She didn t use to have curly hair.(她过去不是卷发) (5)John used to wear glasses,didn t he?(约翰以前戴眼镜,是不是?) 它的否定形式还可以用used not to(在正式的书面语中),同样,一般疑问句形式还可以用Used...to...? 2.be/get used to doing(习惯于做某事) I am used to working hard all day.(我习惯了每天努力工作) 3.be used to do(被用于) Keys are used to open and lock doors.(=Keys are used for locking doors) 4.be afraid of sth/doing sth be afraid to do sth (1)You must be afraid of your headteacher. (2)Don t be afraid of being alone. (3)My son is afraid of going out at night. (4)I m afraid that you are wrong.(这里的意思表示担心,可以翻译为恐怕) (5)Are they afraid to take the test?