3.            I go home early because I am very tired=> IF...... 4.            He doesn’t go to the meeting because he is ill. => IF 5.            She feels very sad becaue she loose her doll.=> IF

3.            I go home early because I am very tired

=> IF..I weren't very tired, I woudn't go home early....

4.            He doesn’t go to the meeting because he is ill.

=> IF he weren't ill, he would go to the meeting.

5.            She feels very sad becaue she loses her doll.

=> IF she didn't lose her doll, she wouldn't fell very sad.