I know in Mandarin, it is easy to say something like "if" by using a statement akin to this:
如果我要去北京的話,我就用飛機。
When I looked up the word "if" in Cantonese, my dictionary brought back the following:
如果
若果
如
假如
若然 ...
And many others. What is the best catch all that is similar to 如果?