1) London wasn't the capital till the eleventh century. - London didn't used to be the capital till the 11th century.
2) When Willian Shakespeare lived in London he acted and wrote plays. - When W.S. used to live in London, he acted and wrote plays.
3) Henry LONGFELOW , ONE OF THE MOST popular American poets of the 19-th century , learnt modern languages. - H.L., one of the most popular American poets of the 19th century, used to learn modern languages.
4) When Michel Jackson was 7 years old he often took part in the concerts. - When M.J. was 7 years old, he often used to take part in the concerts.
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