3. Correct the mistakes. 1. You was tired after work. 2. We celebrate this holiday in the April. 3. Do want something? 4. He is the nine child in his family. 5. Did you washed your hands and face? 6. I need two hundreds dollars. 7. One pupil is in the classroom, the others children are in the yard. 8. This is the thirties-one Avenue. 9. They didn't work in Monday. 10. We can't get nothing from you. 11. I want to buy this toy and you want the others toys. 12. Does somebody know you here? 13. There are many cold days on winter. 14. She was liked her mother. 15. He gives her two third of his money. 16. There is no any apples in the basket. 17. Somebody know this language. 18. They have many practice every lesson. 19. None of we meet him. 20. The twentyth of March was a very hard day for me. 21. There is a few coffee in the cup. 22. I use all these butter for a cake. 23. We knows less words then you. 24. Do they finished their work? 25. Tom and Alice was at the seaside last summer. 26. When was you born? I was born on 1960. 27. They didn't yesterday open their shop. 28. Put those bread into the cupboard. 29. Does she go for a walk often?

Решение:

1. You were tired after work. (I/You/We/They + were)
2. We celebrate this holiday in April. (Месяцы не требуют предлога 'in')
3. Do you want something? (В вопросах используется 'you' перед глаголом)
4. He is the ninth child in his family. (Порядковые числительные)
5. Did you wash your hands and face? (После 'did' используется инфинитив без 'to')
6. I need two hundred dollars. ('hundred' не изменяется во множественном числе при наличии числительного перед ним)
7. One pupil is in the classroom, the others are in the yard. (Артикль 'the' перед 'others' для указания на конкретную группу)
8. This is the thirty-first Avenue. (Порядковые числительные)
9. They didn't work on Monday. (Предлог 'on' для дней недели)
10. We can't get anything from you. (После отрицания 'can't' используется 'anything', а не 'nothing')
11. I want to buy this toy, and you want the other toys. (Запятая перед 'and', соединяющей два предложения; 'other' без 's' для единственного числа)
12. Does anybody know you here? (В вопросах и отрицаниях используется 'anybody' вместо 'somebody')
13. There are many cold days in winter. (Предлог 'in' для сезонов)
14. She liked her mother. (Past Simple для описания прошлых отношений)
15. He gives her two thirds of his money. (Дробные числительные согласуются с существительным: 'thirds', 'money' - неисчисляемое, здесь 'two thirds' относится к частям денег)
16. There are no apples in the basket. (Используем 'no' перед существительным во мн.ч. вместо 'not any')
17. Somebody knows this language. (После 'Somebody' используется глагол в 3-м лице ед.ч.)
18. They have a lot of practice every lesson. ('a lot of' вместо 'many' для неисчисляемых или исчисляемых существительных)
19. None of us meet him. ('us' после 'of', так как 'none' относится к группе)
20. The twentieth of March was a very hard day for me. (Правильное написание порядкового числительного)
21. There is a little coffee in the cup. ('little' для неисчисляемых, обозначает малое количество; 'a few' для исчисляемых)
22. I use all this butter for a cake. ('all this' для неисчисляемых существительных)
23. We know fewer words than you. ('fewer' для исчисляемых существительных, 'less' для неисчисляемых; 'than' для сравнения)
24. Did they finish their work? (После 'did' используется инфинитив без 'to')
25. Tom and Alice were at the seaside last summer. (Множественное число 'were' для 'Tom and Alice')
26. When were you born? I was born in 1960. (Вспомогательный глагол 'were' для вопроса о рождении; 'in' перед годом)
27. They opened their shop yesterday. (Past Simple для обозначения действия, совершенного в определенное время в прошлом)
28. Put the bread into the cupboard. (Без 'those', так как слово 'bread' неисчисляемое и имеется в виду конкретный хлеб)
29. Does she go for a walk often? (Вспомогательный глагол 'does' для 3-го лица ед.ч.)

Ответ: 1. were; 2. in April; 3. do you want; 4. ninth; 5. wash; 6. hundred; 7. the others are; 8. thirty-first; 9. on Monday; 10. anything; 11. other; 12. anybody; 13. in winter; 14. liked; 15. thirds; 16. no apples; 17. knows; 18. a lot of; 19. us; 20. twentieth; 21. little; 22. this; 23. fewer ... than; 24. did finish; 25. were; 26. were ... in; 27. opened; 28. the bread; 29. does