1. you can’t visit the USA unless you have a visa
=> If you don't have a visa, you can't visit the USA.
2. can i borrow your typewriter, janet”? Asked peter
=> Peter asked if he could borrow Janet's typewriter.
3. She started working as a secretary five years ago
=> She has worked as a secretary for five years.
4. She knows a lot more about it than i do
=> I don't know about it as much as she does.
5.My French friend finds driving on the left difficult ( used to)
=> My French friend isn't used to driving on the left.
6. They think the owner of the house is abroad (thought)
=> The owner of the house is thought to be abroad.
7. the children couldn’t go swimming because the sea was rough (too)
=> The sea was too rough for the children to go swimming.