Mixed Conditionals
A mixed conditional is a conditional sentence that mixes the past, present or future. The most common mixed conditional is a third / second conditional (unreal past / present). This is when we talk about something in the past and its result in the present.
• If I had gone to bed early (last night), I wouldn't be tired (now).
• If you had called Lucy (yesterday), she would know about the meeting (now).
• She would be happier (now) if she hadn't taken that job (last year).
Words Instead of 'If'
In case (mainly used with the first conditional)
We use 'in case' to talk about things we do to prepare for future situations.
• Take your umbrella in case it rains.
• I'll bring my car in case you need a lift.
'In case' is different from 'if'.
• Take your umbrella if it rains (= if it doesn't rain, you don't take the umbrella).
• Take your umbrella in case it rains (= it might rain, so take your umbrella anyway).
Provided that (mainly used with the first conditional)
'Provided (that)' has a similar meaning to 'only if'.
• I'll call you provided I have time.
• She will come to the party provided that she has her car.
As long as (mainly used with the first conditional)
'As long as' means the same as 'if'.
• We'll go to the cinema as long as we get tickets.
• As long as you get up early, you'll have plenty of time.