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The 'rule' in Grammar, as I am aware of, is:

Like is used to express similarity between two nouns, while As is used to compare two clauses (clause is a related group of words with a subject and a verb).

However, lets look at the following sentence:

As teachers, we have a responsiblity to set high ethical standards.

In this sentence, we have a responsiblity to set high ethical standards is obviously a clause, but how about as teachers? Its a phrase, but then this would not conform to the 'rule'. And we can't use like in this scenario either.

Can someone please explain. Totally confused.

Thanks,
Bharosey.
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Hi,

You are not considering that the word 'as' has various meanings.

One of the meanings of 'as' is 'in the capacity of / in the role of'. This has nothing to do with comparisons.

eg As a soldier, I am trained to fight.

eg I am speaking to you as your friend.

Thus,

As teachers, we have a responsiblity to set high ethical standards.

means

In our role as teachers, we have a responsiblity to set high ethical standards.

Clive
Comments  
Thanks Clive. What you say makes sense.

Regards,
Bharosey.