1She doesn't study on Saturday 2 he has a new haircut today 3 i usully have breakfast at 6.30 4 PETER doesn't study very hard .He never gets high scores 5 my mother often teaches me English on Sunday evenings 6 I like Math and she likes literature 7 My sister washes the dishes every day 8 they don't have breakfast every morning Công thức (+)S+Vs/es +Ở (-)S+ don't / doesn't +V1+O Công thức có trạng từ tầng xuất (+)S+trạng từ tầng xuất+ Vs/es +O (-)S+ don't/ doesn't + trạng từ tầng xuất + V +O