Could you check the sentences?

Hello teachers,
Could you check the passive sentences?

  1. It will transform your hair after just three washes.
    Your hair will be transformed after just three washes.

  2. The BCN Cosmètics’ new range of shampoos and conditioners give you the silkiest hair.
    The silkiest hair are given you by the BCN Cosmètics’ new range of shampoos and conditioners.

  3. People have used oils and perfumes since the second millenia BC.
    Since the second millenia people had been using oils and perfumes.

  4. We categorize our perfumes into different groups according to their fragance.
    Our perfumes will be categorized into different groups according to their fragance.

  5. We are advertising the Chic Glossy conditioner during the fair.
    The Chic Glossy conditioner will be advertised for us during the fair.

  6. Researchers had not approved the previous formula.
    The previous formula had not been aproved by researchers.

Thanks in advance.

2/ hair is…

4/ are categorised…

5/ by us…

Hello Beeesneees,
Thank you for your help. :slight_smile:

RtL

Not all the sentences are correctly passivized.

  1. People have used oils and perfumes since the second millenia BC.
    Oils and perfumes have been used since the second millennium BC.
    (The plural ‘oils and perfumes’ is possible in this context; ‘by people’ is not essential)

  2. We are advertising the Chic Glossy conditioner during the fair.
    The Chic Glossy conditioner is being advertised by us during the fair.

Hello Anglophile,
Thank you for your help and time.

RtL

Not at all, RtL.