will=be going to,用在there will be句型中直接替换就可以了.
但如果不是there be句型的话,前面有人称代词等主语时,要根据人称代词对be动词进行相应变换.
比如：She will go hiking this weekend.= She is going to go hiking this weekend.
但如果是 They will go hiking this weekend.= They are going to go hiking this weekend.