Second Conditional vs Third Conditional

If I were a bird, I would fly everywhere.

If I was a bird, I would fly everywhere.

If I were a fish, I would swim everywhere.

If I am a bird, I would fly everywhere.

If I had known about the traffic, I would have taken the back roads.

If I would have known about the traffic, I would have taken the back roads.

If I had know about the traffic, I would have taken the back roads.

If I had knew about the traffic, I would have taken the back roads.

When expressing general truths or facts.

When talking about certain or guaranteed situations in the present or future.

When talking about hypothetical or unlikely situations in the present or future.

When discussing past events that actually happened.

If I had eaten healthier, I would have had more energy.

If I had studied harder, I would have had better grades.

If I had known, I would have had a different plan.

If I had more money, I would have had a better car.

be

was

go

were

If I had go to the party, I would see him.

If I went to the party, I would see him.

If I had gone to the party, I would have seen him.

If I had went to the party, I would see him.

If I will go to the party, I will have fun.

If I went to the party, I would have fun.

If I am going to the party, I would have fun.

If I go to the party, I would have fun.

If I had seen the movie, I understand the plot.

If I would see the movie, I had understood the plot.

If I see the movie, I would have understood the plot.

If I had seen the movie, I would have understood the plot.

The role of 'if' in third conditional sentences is to emphasize the main clause.

The role of 'if' in third conditional sentences is to introduce the contrary-to-fact condition.

The role of 'if' in third conditional sentences is to connect two independent clauses.

The role of 'if' in third conditional sentences is to introduce a hypothetical situation.

If I were you, I go.

If I was you, I would go.

If I were you, I would go.

If I were you, I will go.