英文高手！我想你們幫我改下..

I like dog very much because dogs are very cute and very clever.The dog is the　person best friend,because they are very loyal.In master dager time,they will save his master,therefore dogs are very loyer.The dog is loving care the person.In master sad time,they will encouragement his master and they will play with his master. Therefor the dog is loving care.The dog is very intelligent because they are willhelp policeman and customs to finish the mission.
我唔知改得岩唔岩呢

I like dogs very much because they are very cute and clever. Dogs are the best friends of humans as they are very loyal. If the master is in danger, they will save him. Apart from being loyal to their masters, they also care about them. When the master is sad and depressed, they will encourage him and play with him in order to show their love.
Furthermore, dogs are intelligent. They can assist the police and the customs to complete their missions.

I like dogs because dogs are very cute and clever. They are our best friend because of their loyalty. When the master is in danger, they would save their master. The dogs are also loving care to people. When the master is upset, they would encourage their master and play with their master. The dogs are very intelligent because they could assist the policemen and customs officers to complete their missions.

I like a dog,because it is very cute and clever.The dog is person's best friend,because they are very loyal.In case of master dagerous time,they can save its master.The dog is loving care the person in master sad time.They will encourage his master and play with its master.The dog is very intelligent,because they will help policeman and customs to finish the mission.

Wow! So many grammatical mistakes!!!