1 & 2 = 1st conditional    3 & 4 = 2nd conditional   5 & 6 = 3rd conditional

1   if I have enough time              1   go to the meeting

2   if they can (be able to)            2   give it to Fred

3   if that happens                        3   do it

4   if it's possible                           4   come to see you

5   if I'm not late                           5   catch the bus

6   If she isn't ill                            6   finish the report

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