`1.` have been
`2.` has mum put
`3.` have cleaned - haven't finished
`4.` has Tom Brown written - have ever read
`5.` has never tried - Has he ever eaten
`6.` have made - Have you bought
- Present perfect (thì HTHT)
( + ) S + have/has + VpII + ...
( - ) S + haven't/hasn't + VpII + ...
( ? ) Have/Has + S + VpII + ...?