1. The number / English speakers in the world / increase / fast /.
⇒ The number of English speakers in the world is increasing fastly.
2. If I / be / his mother, I would ask him / tidy room everyday.
⇒ If I were his mother, I would ask him to tidy his room everyday.
3. Lena / enjoyed / chat / on the phone / her friends.
⇒ Lena enjoyed chatting on the phone with her friends.