Present Perfect Tense - Sentence Type

Language: English
Subject: English language > Grammar
School grade: Malaysia Malaysia

现在完成式

陈述句,

问句

否定句

写出 Present Perfect Tense 的 功用

仔细观察老师给的 三个 Present Perfect Tense 的句型。
你需要各造两个例子。注意 highlighted 的关键字

Have you bought new school uniforms yet?

I haven't finished my holiday project yet.

I have killed Teacher Andrew already.