`6. ->` How long does it take she to clean up her room?
- How long does it take + O + to V-inf + ...
`->` How long has she cleaned up her room?
- How long + have/has + S + VpII + ...?
`->` How long did she clean up her room?
- How long + do/does/did + S + V-inf + ...?
`7.` `->` They last saw her a long time ago.
- S + last + V2/V-ed + ... + time + ago
`->` It is a long time since they last saw her.
- It is + time + since + S + last + V2/V-ed + ...