the injuries he has had to treat in recent weeks are more serious.
the injuries he had to treat in recent weeks are more serious.
They are not sentences. They are noun phrases; a head noun with a relative clause.
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They are not sentences. They are noun phrases; a head noun with a relative clause.
Hasibul AlamThe injuries he has had to treat in recent weeks are more serious.
The injuries he had to treat in recent weeks are more serious.
There is no practical difference between them. Any difference between the present perfect (first sentence) and the si