Advice for the spinning back and hook kick

Hello all;I am in need about some advice on defend and/or countering with spinning back and the high spinning hook kick.I often have to spar against a Thai Boxer would uses those two kicks very frequelty and when he throws them they are at full power.Every time he throws the spinning back kick,I block it iwth my knee but it sends me flying to the other side of the gym;when we throws the spinning hook kick it almost always connects(unless I am close enough to jam it),I dont want to risk weaving back because if I mistake that hook kick for the back kick it will connect to my midsection.Any Advice?

 

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