Several years ago, I heard that "if A, B" and "B, if A" have difference nuance from Radio English. but not sure I understood correctly and even if understood correctly I can't remember what's the diffrence.

For example, I've written 3 expressions. Which is correct? Are both correct? (if then, which is used commonly in English)

  1. "You get an error if you click this button" v.s "If you click this button, you gen an error"
  2. "You can download mp3 files if you subscribe" v.s "If you subscribe, You can download mp3 files"
  3. "I'll be there if you come" v.s "If you come, I'll be there"

Any help would be appreciated. Thanks in advance.


All of these six examples are perfectly correct and used regularly!

The difference is in the emphasis.

I tend to find the if A, B statements are used to entice and convince (or to scare off if used with negative statements: If you're bad, you can't have a cookie) This can show a stronger sense of cause and effect.

Whereas the B, if A tend to be used to state simple facts. You still get a sense of cause and effect but it's less because they are in the wrong order.

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