painstakingly

"The painter used a thick coat of paint to protect the old wooden fence. "

"Brush your teeth."

"After school, we went outside to watch the sunset. "

"The painstaking attention to detail in her report earned her a top grade. "

"He tried his very best."

"My younger sister achieved good grades in her math class this semester. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"After the first coat of paint dried, he applied another layer."

"The perfect tense, used to describe actions completed before another time, is a useful grammatical tool. "

"My sister learned to write in a very careful manner. "

"The snail crawled slowly across the sidewalk. "

"My sister is a talented artist; she paints beautiful landscapes. "