i think i will be happier there.句子中的BE为什么不用IS呢?也就是为什么要BE呢?

I think we will be I think everything will be OK! .i think you will be No.1 I think there will be fewer______people.I think there will be fewer jobs _____people I think i will be the best one 是什么意思 I think I'will be a reporter in ten If you marry i think i will certainly be I think I will be busy tomorrow as today. I think that I will be deadened什么意思 I think that I will be dream come cure! i don't think homes will have computer.i don't think there will be any I will think about I think I will miss Well,I think there will be more people. I think he will be a doctor.改为否定句 i think there will be more pollution是什么意思 Well,I think there will be more people. I think there will be a dog!反意疑问句