MUST TO不对,must,can,may,shall,could,will这累词必须直接加动词原形,I must say thank you.我必须谢谢你
我一定要说谢谢你.MUST: 一定, 动词Say: 说. 动词俩个动词中间要加to
语法上没有错误但是情理中是错的。应该说成I have to say thank you.
must是情态动词,后面直接加动词原形就可以了。I must say thank you.