Conditionals and time clauses

Conditionals and time clauses

1. ZERO CONDITIONAL

   • Used for universal truths and things that always happen
     • It's form is: If / When + Present S, Present S
       • Present S = Present Simple 
       • It has Present meaning
         • Only appliable for things that happen in present tense 

2. FIRST CONDITIONAL

   • Used for thngs that will happen in the future given a specific condition
     • It's form is: If / Unless + Present S, will + inf
       • Inf = Verb in infinitive 
       • It has Present meaning that then turns into future
       • In negative: If / Uless + Present S, won't + inf

3. SECOND AND THIRD CONDITIONAL

   • SECOND
     • Used for things that could happen given a specific condition
       • It's form is: If + Past S, would + inf
         • Past S = Past Simple 
         • In negative: If + Past S, wouldn't + inf
         • It has present meaning
   • THIRD
     • Used fot things that coud have happened in the past but now are impossible
       • It's form is: If + Past P, would + have + Past Participle
         • Past P = Past Perfect 
         • Negative: If + Past p, wouldn't + have + Past Participle
         • It has Future meaning

4. TIME CLAUSES

   • Used for future events and general statements
     • Formed in the same way as the First or Zero conditional
       • Instead of using "If" or "unless" we use: when, as soon as, etc
         • by the time,after, the moment (that), before, once 
         • It has future and sometimes present meaning

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