比福爷爷
do one's homework (第三人称单数)does one's homework(现在进行时)doing one's homework(过去式)did one's homework可以选一个。。。
小月半月月
doone'shomework(第三人称单数)doesone'shomework(现在进行时)doingone'shomework(过去式)didone'shomework可以选一个。。。
雪落0002
做我的作业:He is doing his homework.(一般现在时) He was doing his homework.(一般过去时)做他的作业:do my homework.(一般现在时) did my homework.(一般过去时)