I met an old friend in the park yesterday.(用强调句改写该句子,4句,分别强调主语,谓语,地点,时间）

主语,
It's I that met an old friend in the park yesterday
谓语,
I did meet an old friend in the park yesterday
地点,
It's in the park that I met an old friend yesterday
时间
It's yesterday that I met an old friend in the park