- how long / you / know / your neighbours?
(five years)
A: How long have you known your neighbours?
B: I've known my neighbours for five years.
- how long / your brother / have / a motorbike?
(he was nineteen)
A: How long has your brother had a motorbike?
B: He has had a motorbike since he was nineteen.
- how long / you / live/ here? (six months)
A: How long have you lived here?
B: I have lived here for six months.
- how long / Jennifer Lawrence / be / an actress?
(she was fourteen)
A: How long has Jennifer Lawrence been an actress?
B: She has been an actress since she was fourteen.
- how long / you / be vegetarian? (many years)
A: How long have you been vegetarian?
B: I have been vegetarian for many years.
Ответ: смотри решение выше.