介绍:
I’ll give you three hints :
1.this kinda animal is lovely
2 this kinda animal is obedient
3 this kinda animal likes eating bones
previously：
proves of pigs and hogs
part1：words and expressions
dog：
n：一个(卑鄙的人)不配做(狗)的(朋友)。
v：跟随.
part 2：various dogs
1、牧羊犬 sheep dog /herding dog
2、工作犬 working dog：
guide dogs 导盲犬
police dogs警犬
sniffer dogs 搜救犬
3、狩猎犬 Hound dogs
4、Toy dogs 玩赏犬
5、Tibetan Mastiff 藏獒
part 3：slang about dogs
1.dog days 三伏天
eg:It's really dog days in summer.
2.a top dog 领导者，优胜者
eg:He is a top dog in the school.
3.rain cats and dogs .
eg:It's rainning cats and dogs yesterday.
4、be old dog at sth
eg：He is a dog at computer repairing.
5、Every dog has its day
eg：C'mon ，every dog has its day，believe in yourself.
6.dog -tired.
eg：I was dog-tired after the basketball game.
