Unit One 1. How often do you exercise ? → How often + 助动词 do(does 或 did) + 主语 + do sth. ? 疑问词 how often 是问频率(多常常), 在这里助动词 do(does 或 did) 是起协助构成疑问旳作用 Every day / Once a week / Twice a month / Three times a month / Three or four tim...

时间:2025-02-22 13:51栏目:高等教育