阅读以下教材原句，感悟体会加颜色情态动词的意思和用法，并总结规律。 1.Most ancient festivals would celebrate the end of cold weather，planting in spring and harvest in autumn. 2.Some festivals are held to honour the dead or to satisfy the ancestors，who might return either to help or to do harm. 3.For the Japanese festival Obon，people should go to clean graves and light incense in memory of their ancestors. 4.Harvest and Thanksgiving festivals can be very happy events. 5.At the Spring Festival in China，people eat dumplings，fish and meat and may give children lucky money in red paper.