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Can I write:

The blind man was waiting at the roadside. John walked / went over to the blind man and offered his help (to him).
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Hi Vincent,
Yes, you can. Can you see any repetition of nouns here? Try using a pronoun.

Best wishes, Clive
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Students: We have free audio pronunciation exercises.
I try:

The blind man was waiting at the roadside. John walked / went over to him and offered his help (to him).
Hi,
OK.
Clive
Thanks. But, can I say,

... waiting on the roadside.

... waiting at / on the road.

Are there correct?
Teachers: We supply a list of EFL job vacancies
Hi,

Yes, you can.

Probably the most common thing is to say 'He was waiting at the side of the road'.

Clive