Proof Reading

The first sentence is a a passive voice in present tense.
The second one is a passive voice in past tense
The first sentence is grammatically correct if it is something about the present, or general truth.
seems to be + verb pp ----->(for present event )
But it is obvious that it talks about something happened already---> snow was blown off the mountain. So, the past form should be used.
The second one is still wrong!!
It should be written as:
Most of the snow seems to have been blown off the mountain.
seems to have been + verb pp------> (for past event )
e.g. The girl is crying bitterly. She seems to have lost her parents.
e.g. The by is crying loudly. He seems to have been punished by the teacher.

我推薦您一個非常不錯的英語學習網站，里面有很多非常不錯的學習資源：


http://www.hkenglishstudy.info


希望可以幫到你!

In my opinion, my answer is contradictionary to this. I think the second sentence is the wrong one. It should be corrected to: Most of the snow seems to have (been) blown off the mountain.

Scilingual : 您似乎誤解了原句之意, 依您之見, 難道The snow is/was/has been blown off by the mountain. 此句不宜用passive voice, 應該用active voice. 請注意: blow off 於原句子的含意為炸掉或炸毀.

001 good!!!!!
all correct, but can add more reasons.

The second one is correct.

It is a matter of passive voice: the snow can't blow off itself from the mountain, it has to be blown off by storm or wind.

Hope this helps.

發問者 : Most of the snow seems to be blown off the mountain.(wrong)
Most of the snow seems to have be blown off the mountain.(wrong)
Most of the snow seems to have blown off the mountain.(correct)
Most of the snow seems to be blowing off the mountain. (correct)