1. If I had chocolate now, I would've eaten it.
如果我现在有巧克力，我将会吃掉。
2. If I knew that you needed my help, I would have helped you.
如果我知道你需要帮助，我将会帮你
3. If you haven't eaten this food before, how would you know if you
like it or not?
如果你没有吃过这个食物，你如何知道你喜不喜欢呢?
最近再复习if相关的用法，发现些困惑的句子。
自己认为应改为
1. If I had had chocolate now, ...
2. If I had known that you needed my help, ...
而第三句整个困惑，不知道为何使用 haven't eaten
麻烦各位指导，谢谢！