"They are from Germany" 的英语表达是 "They come from Germany" 。
其中，"come" 是动词，表示 "来" 的意思，"from" 是介词，表示 "从...来" 的意思。
例句：
They come from Germany. 他们来自德国。
I heard that they come from Germany. 我听说他们来自德国。
Where do they come from? 他们来自哪里？
另外，"They are German" 也可以表达 "他们来自德国" 的意思。
例句：
They are German. 他们是德国人。
I heard that they are German. 我听说他们是德国人。
What nationapty are they? 他们是哪国人？