while & whereas

to express contrast between different things, we can use either 'while' or 'whereas'.

Each can begin a sentence and can go in the middle.

While/whereas temperatures can be below 0 in winter, they can exceed 40 degrees in summer.

Xavier‘s father is French, while/whereas his mother is Chinese.

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However, when talking about two things happening at the same time, only 'while' is correct in both positions.

While I make dinner, I usually listen to a podcast.