walking in the park为什么加ing

walking in the park为什么加ing Walking In the Park 歌词 they are walking in the park提问in the park two men are walking in the park. they have fun walking in the park. 为什么in Beihai Park 不加the Stop the children walking near the fire.stop为什么不加ing?问问?难道是错 they are walking over the bridge为什么walk要加ing? 错句when he walking in the park,he felt a little tired为什么改成he what about riding the bike to the park 的riding为什么要加ing Walking is good exercise,为什么walk要加ing? I like taking photos in the park.taking为啥加ing