Conditional sentences

ТИПЫ ПРЕДЛОЖЕНИЙ
Real condition
Unreal condition in the Present (Future)
Unreal condition Referring to the Past

Условные предложения I типа
Предложения выражают реальные, осуществимые условия, обычно относящиеся к настоящему или будущему времени.
You may have the book if you like it.
If I have time, I shall go to the concert tomorrow.

Образование предложений I типа
If + the Present Indefinite + shall (will) + do
Shall (will) + do + if + the Present Indefinite

Условные предложения II типа
Предложения выражают маловероятные и нереальные условия, относящиеся к настоящему или будущему времени.
If I had time now, I should go to the concert, but I’m busy.

Образование предложений II типа
If + the Past Indefinite + should (would) + do
Should (would) + do + if + the Past Indefinite

Условные предложения III типа
Предложения выражают условия, не реализованные в прошлом и, следовательно, совершенно невыполнимые.
If I had had time yesterday, I should have gone to the concert, but I was busy.

Образование предложений III типа
If + the Past Perfect +
should (would) + have done
should (would) + have done +
If + the Past Perfect

Найди предложения I типа
If my friend came to see me, I should be very glad.
If mother buys a cake, we shall have a very nice tea party.
If you had been busy, I should have left you alone.
If I get a ticket, I shall go to the Philarmonic.
If I live near a wood, I shall gather a lot of mushrooms.
If I had not been too busy, I should have gone to the concert.

Найди предложения II типа
If you don’t work systematically, you will fail the examination.
If I got a ticket, I should go to the Philharmonic.
If I had lived in Moscow, I should have visited the Tretyakov Gallery every year.
If she knew English, she would try to enter the university.
If you put on your glasses, you would see better.
If my friend comes to see me, I shall be very glad.

Найди предложения III типа
If no one came to help, we should be obliged to do the work ourselves.
If you had not worked systematically, you would have failed at the examination.
If my father had returned early, we should have watched TV together.
They would all be surprised if I made such a mistake.
If you had put on your glasses, you would have seen better.