He ate breakfast. / He went to school (before), He ate breakfast before he went to school., She washed her hands./She ate dinner.(before), She washed her hands before she ate dinner., They studied./They took the exam.(before), They studied before they took the exam., She finished homework./She watched TV.(after), She watched TV after she finished her homework., They ate lunch./They went out.(after), They went out after they ate lunch., I brushed my teeth./I went to bed.(after), I went to bed after I brushed my teeth., The bell rang./The students stood up.(when), The students stood up when the bell rang., I arrived home./My mom smiled.(when), My mom smiled when I arrived home., He opened the window./It became cold.(when), It became cold when he opened the window..

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