现在分词及过去式
问题描述：
现在分词及过去式
rest
reach
become
wave
land
join
build
orbit
marry
change
look
cry
答
rest-rested-rested-restingreach-reached-reached-reachingbecome-became-become-becomingwave-waved-waved-wavingland-landed-landed-landingjoin-joined-joined-joiningbuild-built-built-buildingorbit-orbited-...