點解要用are to?

1.students are to blame for the policy.
2.students blame for the policy.
有冇人知呢兩句有咩分別?

1. The first sentence is correct:

To blame for = to be blamed
This is an idiom.

We do not need to add “be” in the sentence. It is still a passive voice sentence.

2. The second sentence is wrong:

People blame XXXX for something,

and we will not say – people blame for something.

The sentence pattern for the second sentence should be:

subject + blame + object for + reasons

E.g. this is an active voice sentence:

The students blame the school for its educational policy.

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1.students are to be blamed for the policy.
學生是诐指責.......o Passive voice

2.students blame for the policy.
學生指責...... Active voice