If I can和If I could都可以吧?

If I can和If I could都可以吧? I would if I could ,but I can't would if i could. IF I COULD TELL if i can help If I can If I can If only I could see if i could see you If I Could什么意思? if I can fly i I would go if I ____.空里应该填can还是could还是两个都可以?为什么? 英语翻译“if i could ,i would.but i can't ,so i shan't. If i think i can i can if i think i can i can I asked him 后面是跟if he can 还是if he could? if i can i will i i can work whenever i want now make me proud i know you can do it if i could .