i want to know if your brother （will join） our school trip to Beijing括号里为嘛要用将来时?if表示是否的时候必须用将来时?

if you are a foreigner...if you want to travel Shandong...I can be your guide.If you have to come to China,if you don't speak Chinese,if you don't know how to get the place where you want to go,please contact me.I can speak good English.I can meet yo I want to know if you ever loved me? I want to know if it ____(not rain) tomorrow i want to know if he ___(come) yesterday. I want to know if you can be with joy, i want to know if there is anything new还是i want to know if there is something new i want to know if there is anything new还是i want to know if there is something new I want to know if Mary needs any help.这里的want to know 是什么成分呢?I want to know if Mary needs any help.这里的want to know 是什么成分呢? I want to know if you are late.Tell me if you are i just want to make love to yo的歌词 I want to know more! I want to know why I want to know ______ I want to know you. i dont want to know I want to know you I just want to know,If you too feel afraid,I can feel your heartbeats. I want to know if i have a guitar lesson tonighe?