我知道在讲过去的事要用过去式
但是有时候明明在叙述一件事实，为何也是用过去式？
就以下列的影片来说
https://www.facebook.com/nasdaily/videos/427429141600091/
0:47
There is a place in Greece with so many life vests that it "made" a mountain.
为什么是用made而不是make?
0:50
Honestly, I thought this "was" fake news.
他以前在想的当下，他认为这是一个假新闻吧。但为何是用was？
1:24
And even something that "looked" like a human bone.
用过去式代表那个东西现在看起来不像人骨了吗？
1:41
We did not know if this "belonged" to a human.
这个看起来不像是与过去事实相反的假设语气
1:46
It "didn't" matter.
2:16
The vest mountain "was" not real.
2:31
Hello from the Greek Island of Lesbos. It "was" a beautiful place.
也不太可能现在就不漂亮了吧？
2:48
The vest mountain "was" real.
他都去验证事实的为真，为何还是继续用was？
2:57
Thousands of discarded life vests...Each one "came" from refugees.
然而
3:29
This gives you an idea of how terrible how situation "is".
这边又变回原形