【正文】
主語時 。 are is 2. It is I who______on duty today. It is Tom that_______ill. ? 在 It is + 名詞或代詞 +that /who + … 的強調(diào)句中 ,謂語動詞要與所強調(diào)的名詞或代詞一致。 is were plus three_________ six. One times two _______________ two. ? 在加減乘除的算式中,謂語動詞用單數(shù)復(fù)數(shù)均可 ,但常用單數(shù)。 like was student in our class_______a dictionary. We each _______ a dictionary ? Each作主語或所修飾的名詞作主語,用單數(shù);如果位于復(fù)數(shù)名詞或代詞之后作同位語,用復(fù)數(shù)。 are Eg: Pe