If i do/If i did...

If i do/If i did...

1. if i find it i'll tell you

   • there is a real possibility that she will find it.

2. If i found it i'd take it to the police station

   • there not expect to find it i'd = would

3. when you imagine something (if + past)

   • if i won a million pounds...

4. we don't use would in if-part

   • if didn't go to their party, they'd be upset (Not if i wouldn't go)
   • but ask to somebody do something (if...would...)
     • I would be grateful if you would let me know your decision

5. could and might also possibly

   • if... might/could...