I think that will be very happy.这句话有没语法错误?

I think that will be very happy.这句话有没语法错误? Trouble will be over,I hope you are happy!这句话有语法错误吗? I think my mother was very happy that day.这句话有没有错误? you will be very happy to see that i think…这句有没有语病 I think I will be very happy!为何要加be? i can do it better that i think 这句话有语法错误吗 Wish you be happy!这句话有语法错误吗? I will be able to be number one这句话有没有语法错误? I think he must be a fool.这句话有语法错误吗 I think that the first thing to do will be relax.这句话有错吗?如果有 I will be very happy with If so.I think that I will be happy什么意思