Записать предложения в пассивном залоге. Не могу.

1)The children were playing tennis from four till five
2)Everybody listened to the teacher with great attention
3)By 6 o'clock he had finished the composition
4)she looks after the patients well

1. Tennis was being played from fout till five2. The teacher was listened with great attention3. The composition had been finished by 6 o'clock4. Patient are looked after wellНасчет последнего сомневаюсь