Part I1 the [ðə, ði:] art.这，那 ad.[用于比较级；最高级前]2 be [bi:] aux. v.(am,is,are之原型) vi.是;在3 of [əv] prep.…的；由…制成的；关于；由于4 and [ ænd] conj.
Unit4 Don’t eat in class1、 rule n. 规则；规章2、 arrive v. 到达3、 (be) on time 准时4、 hallway n. 走廊；过道5、 hall n. 大厅；礼堂6、 dining hall 餐厅7、 listen v.
【句子】It’s time to study 该学习了It’s time to go to bed 该睡觉了【词汇】time [taɪm] 时间It’s time to 是……的时候study ['stʌdi] 学习go to bed 上床睡觉
英语、德语、世界语都至少有2个表“学习”的动词，一个源自拉丁语，一个源自日耳曼语。英语单词learn源自中古英语的lernen，由词根lern加动词不定式后缀-en构成，和德语动词lernen一模一样。词根lern-实际上是由ler-(表“教”)加n（表“学”）构成。
It's never too late to change yourself ，no matter how old you are，no matter how bad your current situation is.If you set a goal and move forward step by step.Life would be turned around at any time.
It was only last winter that I learned to skate.就是在去年冬天我学会了滑冰。例如:She studied chemistry for three years. 她学习了三年的化学。
