一般现在时：1.I often go to school by bus 2.I swim every Friday 3.You look very tired 4.The shop is open eight hours a day 5.We always help each other
一般过去时：1.We went on a picnic last Sunday 2.After fours in the University,he graduated 3.In February of 2004,bird flu began to strike China 4.I watched match yesterday 5.It rained yesterday
现在进行时：1.He is doing his homework2.The teacher is taking a child to the library 3:It is raining now 4.I am writing a novel5.She is eating now
一般将来时：1.Spring will come again 2.We will graduate next year 3.I will buy some apples tomorrow 4.Her parents will send her a skirt as her birthday gift 5.You will have a holiday next weekend