1. I'm not good at English, so I can't become a tour guide. ( if )

=>If I good at E, I can become a tour guide

2. Mary said she would hold an event about skin care the following month. ( will )

=>Mary will hold an event about skin care next month

3. He gave her the book " The fault in our stars" as a birthday gift. ( she )

=>She had received the book ''" The fault in our stars" as a birthday gift''

4.'' If I were you, I would no longer spend most of my time chatting on fb'' he said ( advised)

=>He advised me not to spend most of my time chatting on Facebook

5. When did you start searching for some one fact in the pass? ( How)

 =>How long have you searched for some facts in the past?

6.My mother no longer cooked for me since I married my wife ( used)

=>My mother used to for me when I married my wife

1:  If I good at E, I can become a tour guide

2: Mary will hold an event about skin care next month

3: She had received the book ''" The fault in our stars" as a birthday gift''

4: He advised me not to spend most of my time chatting on Facebook

5: How long have you searched for some facts in the past?

6:My mother used to for me when I married my wife