四、20个疑问代词 问是谁—who 问怎样—how 问时候—when 问原因—why 问什么—what 问哪里—where 问哪个—which 问谁的—whose 问多大—how big 问多高—how tall 问星期—what day 问年龄—how old 问多长—how long 问多久—how soon 问多久—how often 问颜色—what color 问几点—what time 问多少—how many 问价格—how much 问多重—how heavy ……