How can you be so sure?中的be可以换成are吗?

how can you be so sure?可不可以换为 why can you be so sure? How can you be so sure?中的be可以换成are吗? i can understand how you'd be so confused?怎么翻译,you'd 是would How can you be so _______ and still call yourself my friend?（kind） king,you are su foolish that i can't be happy with you! How Can You Be Sure 歌词 How Can You Be Sure 歌词 how can you be so foolish?和She ought to be praised.上面2个句子中什么时候应该加be（to be)啊 什么时候不加啊. i think you can do so.how about you? How can my feelings be so hard to show when I really want him to know.What are you doing? Can you tell me how I can be brave? So how long can you wait for me How can I willing to pay for you so much How I can make you understood!I'm so tired! So how can you have a tough,how can I meet,their life is exactly why? How do you do to be so stupid How can I be so to have you in my life.You're made me astrong and happy person.谁可以给我翻译这句 i feel so lonly ,I really want to get some close friends ,i am not out going ,can you give me some tips how can i get friends ,how can i be happy