No, absolutely not. Forcing a child to do such a thing against their own choosing might only result in fear and negative feelings, which may be very long lasting. It will quite likely be counter productive, taking away the child's enjoyment of the water. Children have to go at their own pace, the pace that is right for them. Sometimes, even when it seems as though a child will never come around, they will suddenly surprise you with a complete change-around. The most important aspect when trying to teach a child to swim or become used to the water is positivity on all accounts. I'm speaking from experience actually, as I have a child who point blank refused to ever put his face in the water. I even had to speak to the school teacher about it, though he was never forced, only encouraged. Then one day he suddenly decided to, it was completely his own decision. And now he loves it.