1. I / already / finish / homework
⇒ I have already finished my homework.
2. Mai / her mother / not / return / market / yet
⇒ Mai and her mother haven't returned from the market yet.
3. How long / be / work / this company
⇒ How long have you been working for this company.
4. We / never / visit / Eiffel Tower/ before
⇒ We have never visited the Eiffel Tower before.
5. Huy / live / Yen Lac Town / since / he / born
⇒ Huy has lived in Yen Lac Town since the day he was born.