Is the sentence said grammatically?

celia qiangchange careers" is very strange

No, it isn't. It is an extraordinarily common phrase.

celia qiangOne sentence should not have two verbs.

Which ones bother you here, Celia?

On sentence, like the one I am writing now, can have several verbs and both make sense and be grammatically correct.

If "change careers" is a common phrase , then "at least he's trying to" becomes strange becuase of "try to do sth"
"at least he's trying to" means "at least he's trying to change careers", where change is apparently a verb.

celia qiangwhere change is apparently a verb.

Yes, but an infinitive verb. 'Try' is the finite verb of the clause

Maybe my question is not expressed clearly. I know ,one sentence can have several verbs.
but in my sentence , I think "change careers" should be changed to " to change careers"
XXXX was to change careers sounds correct.

celia qiangI think "change careers" should be changed to " to change careers"

No; it is fine as it is.

celia qiang One sentence from NPRSo what Hoffman eventually did was change careers or at least he's trying to.here ," change careers" is very strange. One sentence should not have two verbs. Or this is just a spoken mistake?

See
See

CJ

CalifJim See Pseudo-cleftSee (to) beCJ

Thanks very much .
I got it.
Here what he did was change career and what he did was to change career ,both of them are correct.

celia qiangboth of them are correct.

Yes, that's right. More often we leave out the 'to'.

CJ