2 If and Then ClausesConditional sentences have at least two clauses: If clauses andThen clauses.Examples:If I go into town tomorrow, then I will see a movie.If he spoke Chinese, then he would work as a guide in China.If they had been faster, then they would have won the race.
3 If Clauses (the condition) If clauses present the condition.Examples:If I go into town tomorrow…If he spoke Chinese…If they had been faster…
4 Then Clauses (the results) Then clauses present the results.Examples:… then I will see a movie.… then he would work as a guide in China.… then they would have won the race.
5 If and Then ClausesThe word “then” is optional, but the clause is still the result of the condition. So it is a “then” clause, without the word “then.” There are special rules for leaving out the word “if ”. We will learn them later.
6 Remember Never use a future tense twice in a conditional sentence. The four words that NEVER (well, almost never) appear in the If clause are:will, won’t, would, wouldn’tExample:If we will see it, we will be angry.Never use a future tense twice in a conditional sentence.This is not correct: If it will rains, I will stay home
7 Conditional III(past event– impossible)“Making believe” about the past, assuming something that wasn’t true.Form:If had V(past participle), then would have V(past participle).Example:If we had studied, we would have passed the exam.(Fact: We didn’t study and we didn’t pass the exam.)
8 Where does the “not” go?If the girl had not looked both ways when she crossed the street, a car would have hit her. (Fact: She did look both ways, so a car did not hit her.) If the boys had practiced more, they would not have lost the game. (Fact: They did not practice enough, so they lost the game.)
9 Special Rule You can drop the “if ” by moving the “had” to the front. Example:If he had been there, we would have done it.Had he been there, we would have done it.Be careful !! Although you are starting with a “little verb”, this is not a question !!
10 Just Remember Is the situation possible or impossible? Is the situation in the past or in the present/future?The four words that NEVER appear in theIf clause: will, won’t, would, wouldn’t
11 Conditional Form Usage Example 1st conditionalif + present simple, will + infinitiveused to talk about possible situationsIf it's sunny tomorrow, I'll go to the seaside.2nd conditionalif + past simple, would + infinitiveused to talk about hypothetical situationsIf I became rich, I would buy an expensive villa in France.3rd conditionalif + past perfect, would + have + past participleused to talk about hypothetical situations in the pastIf I hadn't gone to Egypt, I wouldn't have seen the pyramidsConditionals are usually expressed with the if clause first and the future clause second but the order isn't important. Both of these sentences are equally correct.