1. I mind my p's and q's whenever I see him.
   每當(dāng)我見到他我都謹(jǐn)慎行事。
2. I'd like to see you whenever it's convenient.
   在你方便的時候我想來看看你。
3. Come whenever you like.
   你什么時候想來就來。

when.ev.er

adv.（副詞）
At whatever time.
當(dāng)…時候
Also when ever When.See Usage Note at whatever
也作 when ever 無論何時參見 whatever
conj.（連接詞）
At whatever time that:
無論什么時候：當(dāng)…時候：
例句：
We can leave whenever you`re ready.
你什么時候準(zhǔn)備好我們就可以動身

Every time that:
每當(dāng)：
例句：
The child smiles whenever the puppy appears.
每當(dāng)那小狗一露面這孩子便面帶笑容