could/ do sums/ Mảy/ at the age of 7/.
=> Mary could do súm at the age of 7.
read and write/ you/ Could/ when you were 6/?
=> Could you read and write when you were 6 ?
could/ Robots/ lìft heavy things/ some years ago/.
=> Robots could lift heavy things some years ago.
move easily/ couldn't/ Robots/ until recent years/.
=> Robots couldn't move easily until recent years.
could/ do sums/ Mary/ at the age of 7/.
=>Mary could do sums at the age of 7
read and write/ you/ Could/ when you were 6/?
=>Could you read and write when you were 6?
could/ Robots/ lìft heavy things/ some years ago/.
=>Robots could left heavy things some years ago.
move easily/ couldn't/ Robots/ until recent years/.
=>Robots couldn't move easily until recent years.
could/ do sums/ Mảy/ at the age of 7/.
---> Mary could do sum at the age of 7.
read and write/ you/ Could/ when you were 6/?
---> Could you read and write when you were 6?
could/ Robots/ lìft heavy things/ some years ago/.
---> Robots could lift heavy things some years ago.
move easily/ couldn't/ Robots/ until recent years/.
---> Robots couldn't move easily until recent years.
