prek2第4单元22页课文内容
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辅音/s/ /z/ /θ/ /ð/
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辅音/f/ /v/
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辅音/k/ /g/
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辅音/t/ /d/
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辅音/p/ /b/
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句型 would like to do sth.
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句型want sb. to do sth.
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句型have to do sth
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元音/i/ (/i:/)
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