一道语法填空题。

Question

It's good for your health ____ (eat) an apple everyday.
这里填eat的什么形式？ 请高手详细解释为什么，谢谢！！！

Answer 1

你好。可以是eating 动名词形式和to eat不定式形式。
具体就是：
1 EATING an apple every day is good for your health.
2 TO EAT an apple every day is good for your health.
这两种形式在现代英语中都是the right形式，但在考卷中不应该同时出现作为选项供考生选择，否则就不严谨了。

Answer 2

eating
在这里动名词短语是真正主语后置，前面的it是形式主语。即：
Eating an apple everyday is good for your health.
每天吃一个苹果有益于身体健康。
动名词表示重复的行动。
动词不定式更侧重于某一具体的行为。

Answer 3

to eat 这是固定句型：It's +形容词+for sb.+to do sth.

Answer 4

it's +形容词 for sb. to do sth. 固定习惯用法本回答被提问者采纳

Answer 5

to eat