don't(完全形式)( )David所有格( )sisters所有格(
don't(完全形式)(do not )David所有格( David's )sisters所有格( sisters' )travel现在分词( travelling )right同音词( write )Chinese名词( China )aren't同音词( aunt )swim现在分词( swimming )dance现在分词( dancing )watch第三人称单数( watches )wait三单形式( waits )US同义词( America )UK同义词( England )good副词( well )