同位语从句和表语从句是只能用that吗

同位语从句不一定只用that ,但多数情况是用 that .I have an idea that we have dinner together.后面从句不含疑问I have no idea whom we have dinner with.后面从句有疑问表语从句和主语从句,宾语从句一样,看后面...