[Grammar] "To be" + preposition

[Checkmate]

I was taught that "To be" can be two types of verbs, auxiliary and linking verb.

"She is running." Auxiliary verb

"She is married". Linking verb

However, I'm not sure whether "To be" before a preposition is an auxiliary or linking verb. Which one is correct?

 

[Matthew Wai]

If you mean something like 'the book is on the table', it should be an intransitive verb, according to
http://www.oxfordlearnersdictionaries.com/definition/english/be_1
Not a teacher.

 

[Checkmate]

If you mean something like 'the book is on the table', it should be an intransitive verb, according to
http://www.oxfordlearnersdictionaries.com/definition/english/be_1
Not a teacher.

Thank you for the explanation but I think there is an error in the dictionary. If you search "Keep" you can see that it doesn't say anything about its Linking verb form there.

 

[Matthew Wai]

Why do you think 'keep' is a linking verb?

Not a teacher.

 

[Checkmate]

Why do you think 'keep' is a linking verb?

Not a teacher.

I think so because you can use an adjective and past participle after it.

"Keep calm".

"Keep me logged in". (Facebook.com)

"Keep quiet".

 

[Matthew Wai]

http://examples.yourdictionary.com/examples-of-linking-verbs.html
I just found the above page, where 'keep' is listed as a linking verb.
Not a teacher.

 

[MikeNewYork]

I have also seen "keep" described as an auxiliary verb. It is one of those strange ones.

 

[Checkmate]

I have also seen "keep" described as an auxiliary verb. It is one of those strange ones.

Would you give me an example? It will be useful sometime.

 

[MikeNewYork]

Check here: (between 5 and 6): http://www.phon.ucl.ac.uk/home/dick/aux.htm