They will going to be a.........这样的句子对吗？我总觉得 will

They will go to Sanya by plane.(\u540c\u4e49\u53e5\uff09They___going to______ _______ ______to Sanya.

=They are going to take a plane to Sanya .

i am going to be sixteen soon
there will be a party for new year
will you go shopping with me next time
will he come to school early next monday No,he won't
will we meet at 5
we are going to order a pizza for dinner

will 和 be going to 都表示将来时，后面跟动词原形，二者不能重复用
这个句子可以这样写：
They are going to be ........
或 They will go.........

因为这句子不对。

will do sth 和 be doing to do sth 是两种结构

will或者is going to，

they will do sth or they are going to be

扩展阅读：they will ignore you ... leatherstocking tales ... they wont be ready ... ma li will go with me ... james fenimore cooper ... is the river through that ... the past within ... dream it possible ... please tell me about it ...