在英文中,"他总是走很快"可以用下面的表达来表示:

He always walks very fast.
He is always a fast walker.

"Fast"是一个形容词,意思是"快的",在这个例子中用来形容"walk"(走)。"Always"是一个副词,意思是"总是",用来修饰动词"walks"。

这个表达方式适用于描述一个人通常都很快地走路。例如:

My colleague always walks very fast. He's always in a hurry.
My sister is always a fast walker. She's always the first one to arrive at our destination.

希望这些信息对你有帮助。