在英语中，“他拿出笔”可以用下面这些表达来表示：

He took out a pen. 他拿出了一支笔。
He produced a pen. 他拿出了一支笔。
He pulled out a pen. 他拿出了一支笔。

这些表达均用于描述一个人从某个地方取出一个物品（在这种情况下是一支笔）。

例句：

I saw him take out a pen and start writing. 我看到他拿出一支笔开始写字。
She produced a pen from her bag and began to take notes. 她从包里拿出了一支笔，开始做笔记。
He pulled out a pen from his pocket and started signing the document. 他从口袋里拿出一支笔开始在文件上签字。