He had to finish the work(改为否定句）

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Hehadtofinishthework(改为否定句）Hehadtofinishthework(改为否定句）Hehadtofinishthework(改为否定句）Hedidn''thavetofinis

He had to finish the work(改为否定句）
He had to finish the work(改为否定句）

He had to finish the work(改为否定句）
He didn't have to finish the work