what can we do if we are sink?

what should we do if we are sink?????
以上句子文法有錯!!!
應該是: What should we do if we are sinking?

ANS:
-First, we should calm down.
-Then, we should try our best to relax so that we can flow on the water.
-When we our mouth is above the water, we should shout "HELP".

通常叫drowning.. 唔係sinking 呢 :P

we should shout londly.

We can shout HELP