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激发学生说英语的兴趣、参与英语朗读的意识和积极性，培养学生良好的语感和朗读习惯。
教学重难点：
教学重点：能够找到语音的同化异化部分
教学难点：能够针对四种基本语音同化异化形式进行正确发音
教学过程：
Step 1.Greetings
Step2.Lead in
Sing a song called who took the cookie from the cookie jar with funny gesture
Step3 Show the students the teaching objectives
The students read the teaching objectives.
Step4. Give the students four sentences about assimilation
A. Show students four sentences and read them one by one
Would you speak more slowly?
Nice to meet you.
God bless you
He tells you the truth
B.Listen to the audio video three times ,then find out the difference
C. Show students the same four sentences again with red letter d、t、s、y.Ask the students to come to the front and write down the phonetic symbols of d、t、s、y
D.The teacher explains the definition of assimilation.
[d ]+ [j]= [d?] \[[t]+ [j]= [t∫] \[s] + [j]= [∫]\ [z]+ [j]= [?]
Step 5.Practice
Play four short videos and give the students four requests
First, listen carefully.
Second, read after the videos in a low voice.
Third, read after the video loudly while writing down the sentences
Fourth, read the sentences to their partners
Encourage the students to enjoy the happiness of reading
Imitate the sentences in groups,the teacher pay more attention to the assimilation.
Step6.Give the students four groups of words about dissimilation
1.spend speak