If I saw someone stealing, …
I would + infinitive
If I was a cartoon character, …
I would + infinitive
If I had more free time, …
I would + infinitive
If I lost my wallet / purse, …
I would + infinitive
If I lived in the USA, …
I would + infinitive
If I were famous, …
I would + infinitive
I’ll cook a dinner for you if …
if you + present simple
If I could live anywhere in the world, …
I would + infinitive
If it doesn’t rain at the weekend, …
I will + infinitive
I’ll do your homework for you if …
if you + present simple
I wouldn’t be frightened …
if + past simple
If I saw a ghost, …
I would + infinitive
If I needed £100,000 quickly, …
I would + infinitive
If I had a time machine, …
I would + infinitive
If I could see into the future, …
I would + infinitive
If I were a type of animal, …
I would + infinitive