1. 被閃電打到比較適合用 struck by lightning

2. 這有可能發生，應該使用條件句比較適當，非假設語氣。
If I am struck by lightning, you can buy a lottery ticket (and make a fortune). The winning number will be the date of my death.

3. 正確日期要用 date 比較好

如果要用假設語氣，和現在事實相反
基本功夫是 If S. (不管什麼主詞) WERE struck...
BE 動詞一定要用 were

If I were （亦可 2. If I should be 3. If I were to be）struck by lightning, you could buy a lottery ticket (and make a fortune). The winning number would be the date of my death.

If I should be ... 是『萬一』：幾近不可能發生，也視同 假設語氣。
If I were to be... 是和未來事實相反的假設，因為這個假設要在未來發生，也可以使用

最後，看看實際使用法 - 先前說的，被閃電打到有可能發生啊，避免使用假設語氣。

If I am struck by lightning, what are the odds of me surviving?