在I saw him today一句中，him一词为宾格。
In the sentence, 'I saw him today', the word 'him' is in the accusative.
在I sent her a postcard一句中，her一词处于与格。
In the sentence, 'I sent her a postcard', the word 'her' is in the dative.
在They live in the country一句中，动词复数形式live与复数主语they一致。
In the sentence 'They live in the country', the plural form of the verb 'live' is in agreement with the plural subject 'they'.
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