different名词 collect名词 sell反义词 happy名词 stand过去式 busy反义词 careful副词 skip现在分词
问题描述：
different名词 collect名词 sell反义词 happy名词 stand过去式 busy反义词 careful副词 skip现在分词
答
different difference
collect collection
sell buy
happy happiness
stand stood
busy free
careful carefully
skip skipping
注:现在分词是现在进行时.
答
different名词:difference
collect名词:collection
sell反义词:buy（形容词）
happy名词:happiness
stand过去式:stood
busy反义词:free（形容词）
careful副词:carefully
skip现在分词：skipped
答
different名词difference
collect名词collection
sell反义词 buy
happy名词 happiness
stand过去式stood
busy反义词free
careful副词carefully
skip现在分词 skipping