[ابو بيشو]

Occasionally you'll hear someone say – ‘I haven't a clue’, but using ‘haven't’ in this way isn't really usual. So for example we wouldn't normally say ‘I haven't a pen’ or ‘I haven't a book’. We would normally say – ‘I don't have a book’, or ‘I don't have pen’.
It's important to remember then that ‘have’ can be a main verb or an auxiliary verb. If it's a main verb you need another auxiliary to support it, such as ‘do’. ‘Do you have a new car?’

When it's an auxiliary verb it's helping another verb – ‘Have you got a new car?’ But please try to avoid – ‘I haven't a new car.’