Will you be seeing it 这句话里面为什么要加be?

will you be seeing it You need’t be so rude about it.这句话里为什么要加be呢? it will be better为什么加Be? It will be nice seeing them again It must be terrible to be grown up!这句话里为什么要加be呢? you will be late 为什么要加BE i will be seeing you意思 I will be seeing you的seeing是什么意思? It will probably be sunny today里面的will是什么意思呀,这句话, I will be looking forward to seeing you soon I think you will be good friends.为什么要加be How long will you be in this country.为什么要加Be...