基本句型:It is/was(原句时态决定)...that/who...
疑问句型:Is/was it...that/who...?(一般)
疑问句型:Wh- is/was it...that/who...?(特殊)
在not...until的句型当中:It is/was not until+原句until后的部分+that/who...
情态动词表推测在强调句中的应用:It might be...that
情态动词表推测在强调句中的应用:It can't be...that
情态动词表推测在强调句中的应用:It might have been...that
情态动词表推测在强调句中的应用:It must have been...that