请问：我们可以先沟通一下的英语怎么说？

We can communicate for some time first.
We can talk a little bit first.
We can make some contact with each other first.

We may have a few words first.
Let's begin with a few words.
conversation应该可以
contact不知道好不好.....

我认为这里用communicate不好，因为communicate因为通常是指两个已经相识的人之间的互相通信、联系。依题意，“我们可以先沟通一下”说明两人并不熟，所以用communicate不好。
而pre-communication，我不敢说错，但毕竟是交际用语，一些自己定的复合词别人未必会懂哟!!

Shall we talk beforehand?
口语中不太用communicate ,in advance 这样的大词

正式说法是
do you think it is necessary for us to have some pre-communication?

we can first have a communication.
或
we can communicate first.

communicate vi.交换（意见， 情报）； 通讯； 联络； 通信（with sb.）
communication n.

We may first link up

We can communicate what