Turn into a question: In 1983, mobile phones had cameras.
Did mobile phones use to have cameras?
Turn into a negative statement: Mobile phones did cost a lot of money.
Mobile phones didn't use to cost a lot of money.
Turn into a question: Most people owned a mobile phone.
Did most people use to own a mobile phone?
Turn into an affirmative statement: Mobile phones weren't bigger
Mobile phones use to be bigger.
Turn into a negative statement: Mobile phones had touch screens.
Mobile phones didn't use to have touch screens.
Turn into an affirmative statement: Mobile phones didn't have speed dial.
Mobile phones use to have speed dial.
Turn into a question: Mobile phones sent text messages.
Did mobile phones used to send text messages?
Turn into a negative statement: Mobiles phones had bluetooth.
Mobile phones didn't use to have bluetooth.
Turn into an affirmative statement: Mobile phones weren't grey
Mobile phones use to be grey.
Turn into a question: Mobile phones had a wi-fi connection.
Did mobile phones use to have a wi-fi connection?
Turn into a negative statement: Many kids had access to a mobile phone.
Many kids didn't use to have access to a mobile phone
Turn into a question: In 1983, people got mobile phones from stores.
Did people use to get mobile phones from stores in 1983?
Turn into an affirmative sentence: People didn't toss their phones as garbage.
People use to toss their phones as garbage.
Turn into a negative sentence:In 1983, people had apps on their phone.
People didn't use to have apps on their phone in 1983.
