Ответ:

1. Is he speaks German fluently?

he isn't speaks German fluently.

2. Is Lora swam yesterday?

Lora isn't swam yesterday.

3. Are they cooking at the moment?

they aren't cooking at the moment.

4. Is his sister always have breakfast at 8?

his sister isn't always have breakfast at 8.

5. Are we must keep the room clean?

we aren't must keep the room clean.