1. sometime 某一個時候，某一個特定的時間 / sometimes 偶爾，有時
e.g.
We should get together sometime. / We should get together sometime next week.
我們該找個時間，或者我們下個禮拜該找個時間聚聚。
Sometimes I like to go to the library to read.
有時候我喜歡去圖書館看看書。

2. beside 在旁邊 / besides 除了…，并且
e.g.
Someone is beside you, but I'm the only one who can see him.
有個人在你旁邊，但是只有我看得到他。
That's beside the point. 那不重要。
I can't talk to you right now. I'm tired. Besides, I'm studying English.
我現在不能和你說話，我很累。而且，我還在念英文呢！
Besides studying English, what else do you like to do?
除了學英文，你還喜歡做什么呢？

3. leave v.離開，留下某人 n.假期，放假
e.g.
Please don't leave until you finish reading this article.
讀完這篇文章之前不能離開。
Don't leave me here alone !
別讓我一個人待在這。
I wish I were on leave right now.
我真希望自己現在在放假。
leaves
a. third person singular 動詞“離開”的三單形式
b. plural form of leave or leaf 名詞“葉子leaf”或者“假期leave”的復數形式

4. mean v.意思是，意味著 adj.吝嗇的，刻薄的 n.平均數
what do you mean?
你什么意思呢？你幾個意思？
That's really mean.
太過分了！
means n. 方式，方法，途徑
I am not that out-going, but by no means an unsociable person.
我可能不是那么外向，但是絕對不是不合群的那種人。