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Answer of exercise 2
We form the affirmative past simple tense of regular verbs by adding -ed.
decide = decided (-d)
open = opened (-ed)
stop = stopped (double the last consonant -ed)
Answer of exercise 3
a) ... didn't
b) Did ...?
Answer of exercise 4
go (went)
like (liked)
see (saw)
get (got)
start (started)
read (read, sound different)
say (said)
wish (wished)
come (came)
hate (hated)
Answer of exercise 5
She didn't live in New York for 18 years. She lived in New York for 16 years.
She didn't grow up in the same place. She grew up in different places.
She didn't start writing for children's television in 1992. She started writing for children's television in 1991.
Her books The Hunger Games Trilogy weren't successful in one country. Her books The Hunger Games Trilogy were successful in lots of countries.
She didn't write a book about a character called Gregor and his little brother. She wrote a book about a character called Gregor and his little sister.