1. We won’t stay here. They won’t stay here.
→ We won't stay here and they won't, either.
2. She is studying her lesson. I am studying my lesson.
→ She is studying her lesson and I am, too.
3. He can’t swim. His sister can’t swim.
→ He can't swim and his sister can't, either.
4. My son likes to drink milk. I like to drink milk.
→ My son likes to drink milk and I like, too.
5. She doesn’t like candy. He doesn’t like candy.
→ She doesn't like candy and he doesn't, either.
6. You should brush your teeth after meals. They should brush their teeth after meals.
→ You should brush your teeth afrter meals and they should, too.