I met my fater at the school gate yesterday .改为强调主语、时间、地点的强调句

I met my fater at the school gate yesterday .改为强调主语、时间、地点的强调句

强调主语：It was I who met my father at the school gate yesterday.
时间：It was yesterday that I met my father at the school gate.
地点：It was at the school gate that I met my father yesterday.

It was in the park that I mat my old teacher yesterday. (强调地点It was at the school gate that I met an old friend of mine.（强调