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jim and tom are brother 变否定句

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jim and tom are brother 变否定句
帮我讲讲这类题,
顺便在问几道
it is an orange 对an orange提问
my father is fine 对fine提问
he is 13(变负数)
jim and tom are brother 变否定句
加个s
Jim and Tom are brothers
吉姆和汤姆是兄弟
Jim and Tom is not a brother
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is
动词 (用于第三人称单数现在时)是
(与-连用构成现在进行时;与-连用构成被动语态
are
动词 (用于第二人称单复数现在时,第一、三人称复数现在时)是
(与-连用构成现在进行时;与-连用构成被动语态)