Jim wrote to his uncle yesterday改为否定句,

Jim wrote to his uncle yesterday改为否定句,
Jim wrote to his uncle yesterday改为否定句,

Jim wrote to his uncle yesterday改为否定句,
Jim did not write to his uncle yesterday.
陈述句改为否定句,就是有情态动词就在情态动词后加not,无情态动词,在实意动词前加否定助动词