We will go on a picnic unless it rains tomorrow.
或
We won't go on a picnic if it rains tomorrow.這句話是什么意思？明天如果不下雨，我們就去野餐。I like swimming in the river,My sister likes swimming in the river,too.該為同義句。Both my sister and I like swimming in the river. Not only I, but also my sister likes swimming in the river. My sister and I like swimming in the river.