help me with this grammar

[许国真]

honestly i want to write "they don't know each other but help each other"

so i write "他们互相不认识但他们互相帮助" is this right?

help me i have 写作的作业

[skylee]

But what does it mean? Does it mean like a stranger helping a guy on the street? But how do they help each other?

I think your Chinese sentence is fine. You might want to shorten "互相不认识" to "互不相识".

[malanting]

I would say “他们素不相识，但还是互相帮助。” It all depends on the context. Or you can say 他们不认识，互相 is not necessary here.