Why don't you join us?
Why don't you join us? Sure, I'd love to. Would you like to come with us? Next Sunday we are going to hvae a picnic in the park. Would you like to come with us? I'd love to!

为什么不加入到我们当中呢？
为什么不加入到我们当中呢？ 好的，我很愿意的！ 你想和我们一起来吗? 下周我们要到公园去野餐，你想和我们一起来吗？ 我非常愿意！