当who在句中作主语时谓语动词要用三单形式，疑问词作主语时，谓语动词一定用单数第三人称形式，叫做“状况不明，视为单数”。当who在句中作宾语时，根据主语的形式决定。如their是第三人称复数，则不用三单形式。
who造句
1、Contestant: Says who?
2、The priest who died?
3、Who was this foreigner who was treated with such reverence?
4、So who has the edge?
5、But who is this self?
6、Reward someone who supports you.
7、One who uses a snowboard.
8、During this time, gossip columnists crowd around celebrities to report on who arrived with who, and who looks the best.
9、Those who were penitent obtained absolution.
10、Everyone who paid will receive a kickback.