T:Yes,he is.Let's see how to say it in English.
(Put the card "cousin" on the blackboard.)
T:It's cousin.Read after me,COUSIN,cousin.
Ss:COUSIN,cousin.
T:Spell it,please.
Ss:COUSIN,cousin.
...
T:This time you must say it in English.She is your sister.But your father is not her father.Her father is not your father.Her father and your father are brothers.You have the same grandmother.Who is she?
Ss:She's my cousin.
T:Your father's brother is your...?
S3:"大爷,大伯".
S4:"叔叔".
T:You are right.Let's see how to say it in English.
(Put the word card "uncle" on the blackboard.)
T:Read after me,please,UNCLE,uncle.
Ss:UNCLE,uncle.
...
T:Your uncle's wife is your...?
Ss:"伯母,婶婶".
T:Right.
(Put the card "aunt" on the blackboard and then teach the words "son" "daughter" in this way.)
T:Read the words on the card together.