他使劲儿推门。
tā shǐjìn ér tuī mén 。
He pushed the door with all his strength.
我们要使劲儿练习中文。
wǒmen yào shǐjìn ér liànxí zhōngwén 。
We need to practice Chinese with all our effort.
她使劲儿喊让大家注意。
tā shǐjìn ér hǎn ràng dàjiā zhùyì 。
She shouted with all her strength to get everyone’s attention.