we fly kites. 为什么fly 是动词原形,谢谢

we fly kites. 为什么fly 是动词原形,谢谢 we can fly kites seven years ago. where shall we _____ to fly kites we fly kites （）of our school fly kites过去式是flied kites还是flew kites为什么? fly kites为什么kite要加上s? They fly kites对吗 It is sunny.Let's fly kites in the park,_shall we_____?为什么填shall we? We _（fly）kites in the park on Sundays. go kites shall fly we the and(?) 排序 We like --kites in spring.应该填fly还是flying Can we fly kites in spring?怎么回答啊 We( )fly our kites tomorrom.中填什么快 We does not fly kites last Sunday.中文翻译 fly,in,can,we,kites,spring怎么连词成句 fly kites (fly a kite)翻译 We often have fun----kites in the park?A to fly B fly C flying 文；many children go to the school to fly kites on the playground we fly kites （）of our school