Need help with some Spanish Sentences

Hello. I'm Danish student, and I need help with the following sentences:

 - Identify the primary/main members of a sentence in the following sentences

Regards

X11

Hello. I'm a Danish student, and I need help with the following sentences:

 - Identify the primary/main members of a sentence in the following sentences

1. Esta novela la he leído antes.  I have read this novel before.
   
2. La casa es grande. The house is big.
   
3. Le he regalado el juguete que quería. I've given him the toy he wanted.
   
4. Está claro que va a venir. I'm sure he is going to come.
   
5. Aquí se venden manzanas. Apples are sold here.
   
6. Me duele la cabeza. My head is aching.
   
7. Hay muchos alumnos en el aula. There are a lot of students here.
   

Regards