Respuesta:
1. they are friends
2. sam is at home now
3. liz and kate are at school
4. tim is eleven years old
5. dan is a student
6. you are at the english lesson
7. they are from london
8. i am in the park
9. she is a doctor
parte dos
1. liz is ill
2. Ben is my best friend
3. Liz and Jate are sisters
4. Tim and Bob are at home
5. dogs are animals
6. Nick is from london
7. Bill is eleven now
8. They are very lazy
9. We are in the hall
Explicación:
El verbo to be es dificil de explicar, pero va antes del verbo y es un auxiliar. SIEMPRE con el verbo to be, le agregamos al verbo -ing (ej: playing). Ahora por lo que veo estás dando el verbo to be en presente.
Hay 3 formas del verbo to be segun el pronombre (el sujeto, la persona, etc)
Cuando hablamos de "I" (yo) usamos "am". I am playing tennis (estoy jugando al tenis)
Cuando hablamos de "you" (vos), "they" (ellos/as) y "we" (nosotros/as) se utiliza are. We/they/you are playing tennis.
Cuando hablamos de "he" (él), "she" (ella) o "it" (eso) se utiliza "is". He/she/it is playing tennis.
