Have you + V-ed …?

结构︰

Have／Has＋主语＋过去分词＋…？

说明︰

将<助动词> have（has）提到句首，即构成<现在完成式>的疑问式。

Have you had your lunch?
你已吃过午饭吗？
Has she ever written a letter to Mark?
她曾经写信给马克吗？
Have you found the pen you lost yesterday?
你找到昨天丢失的钢笔了吗？