One day,Allan and his friend Henry went swimming in a river.It was very hot.How happy they were in the river!After they got out of the water,they played games in the sun for a while.On their way back,Henry saw some flowers.He liked flowers very much

One day,Allan and his friend Henry went swimming in a river.It was very hot.How happy they were in the river!After they got out of the water,they played games in the sun for a while.On their way back,Henry saw some flowers.He liked flowers very much
One day,Allan and his friend Henry went swimming in a river.It was very hot.How happy they were in the river!After they got out of the water,they played games in the sun for a while.
On their way back,Henry saw some flowers.He liked flowers very much and ran into the green field to look at them.Now Allan was walking by himself.
Then he heard Henry calling out,“A snake!Help!…”
“What’s wrong with you?” asked Allan.
“A snake bit（咬）me in the leg.Come here!”
Allan ran over and saw a small red wound（伤口）on Henry’s leg.
“The snake was in the grass.I didn’t see it.”
“Sit down quickly!” Allan told Henry.
Allan put his mouth at the little red wound and began to suck（吸）at it.In this way he saved（挽救）Henry’s life.“Oh,Allan,it’s very kind of you to help me.”
“That’s all fight.We are friends and we must always help each other.”
请求找一下这里面的过去式并改回原型
急用急用各位大哥大姐帮帮忙啊

One day,Allan and his friend Henry went swimming in a river.It was very hot.How happy they were in the river!After they got out of the water,they played games in the sun for a while.On their way back,Henry saw some flowers.He liked flowers very much
One day,Allan and his friend Henry go swimming in a river.It is very hot.How happy they are in the river!After they get out of the water,they play games in the sun for a while.
On their way back,Henry sees some flowers.He likes flowers very much and runs into the green field to look at them.Now Allan is walking by himself.
Then he hears Henry calling out,“A snake!Help!…”
“What’s wrong with you?” askes Allan.
“A snake bite（咬）me in the leg.Come here!”
Allan runs over and sees a small red wound（伤口）on Henry’s leg.
“The snake is in the grass.I don't see it.”
“Sit down quickly!” Allan tells Henry.
Allan put his mouth at the little red wound and begins to suck（吸）at it.In this way he saves（挽救）Henry’s life.“Oh,Allan,it’s very kind of you to help me.”
“That’s all fight.We are friends and we must always help each other.”