Tìm một lỗi sai trong mỗi câu và sửa lại: Mr. Johns worked hard and his close friend didn't

Tìm một lỗi sai trong mỗi câu và sửa lại
1. Mr. Johns worked hard and his close friend didn't
2. Oue father like swimming, and so can we
3. On Sunday, I am always go swimming. My brother does, too
4. My grandfather is old and so does Nam's grandfather
5. My sister doesn't go to school today and neither don't I