Help out: to help sb, especially in a difficult situation 帮助某人摆脱（困境）
He's always willing to help out.
他总是急人之难。
When I bought the house, my sister helped me out with a loan.
我买这所房子时，我姐姐借给了我一笔钱解了急。
Come over:随便来访
You really must come over sometime and have dinner with us.
你该抽时间过来跟我们一起吃顿饭,
Come over anytime;we're always in.
什么时候来玩都行，我们一直在家.
