Each of these sentences has one incorrectly placed apostrophe. Can you find it?

1. I have'nt got what I'm looking for, but I'll tell you when I've found it.

   1.   ?    have'nt
   2.   ?    I'm
   3.   ?    I'll
   4.   ?    I've

2. He can't see where his girlfriends' sitting, because she didn't tell him she's moved.

   1.   ?    can't
   2.   ?    girlfriends'
   3.   ?    didn't
   4.   ?    she's

3. Wher'eve you put your mother's coat? I'm sure she wouldn't like to go without it.

   1.   ?    Wher'eve
   2.   ?    mother's
   3.   ?    I'm
   4.   ?    wouldn't

4. I don't know where you're going with that trolley, but if you give me it's handle I'll try to help you get it back.

   1.   ?    don't
   2.   ?    you're
   3.   ?    it's
   4.   ?    I'll