posted by John .
I am worried about his health.
I am concerned about his health.
I worry about his health.
Are all grammatical? (above)
Which one is commonly used?
Would you let me know other similar expressions?
I don't like both of them.
(Is this the following in meaning?)
= I like one of them, but I don't like the other of them.
Among the first three, all are grammatical. The first is probably the most commonly used.
Rather than "I don't like both of them" (uncommon phrasing), you should say, "I don't like either of them." That's when you simply don't like them at all. If you like one but not the other, then you have to say it like that -- "I like this one, but not that."