think(s) hard 有s吗

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think(s)hard有s吗think(s)hard有s吗think(s)hard有s吗think后是否有s,取决于主语.如果主语是第三人称单数时,加s,否则不加s.如Ioftenthinkhard

think(s) hard 有s吗
think(s) hard 有s吗

think(s) hard 有s吗
think 后是否有s,取决于主语.如果主语是第三人称单数时,加s,否则不加s.
如 I often think hard at it.
He often thinks hard at it.