Do,Did,DoesIs,was,were,are希望对你有帮助，满意请及时采纳，你的采纳是我回答的动力！
have; has; had; am; is; are; do;does; did; can ;could; may; might; will; would; shall; should; must; need etc
Who,Why,What,When,How希望对你有帮助。
