Grammar: Keep your eyes opened? Keep your eyes open?

i believe it's "open." earlier in the sentence you use "keep" which implies present tense, so therefore it must be "open" to match the already used present tense.

and also just my personal opinion, you don't have to use it if you don't want to, but i think the first part should read:

"we must not think we are too well informed to be taught any subject, but we must keep our eyes and ears open..."

good luck with whatever this is for, i hope it goes well :)

"keep your eyes open" is correct, since it indicates a state which presently exists and that you are actively maintaining.

"keep your eyes opened" would imply that your eyes have been opened at some point in the past but are not necessarily still in that state.

Keep your eyes open.

the "ed" in opened means past tense so the correct way to say it is Keep your eyes open

"Open" is an adjective, and you can use an adjective there. "Open" is also a verb, and you can use its past participle as an adjective; that is routine, and it has nothing to do with verb tense. Example: They are married. "Married" is a past participle adjective. The verb in that sentence is "are."

So "open" and "opened" are both adjectives; adjectives have no tense. You can use either.

Both are grammatically correct.

"Keep your eyes open."

In the above, "open" is an adjective. It describes "eyes," the condition in which the command is ordering that your eyes be kept.

"Keep your eyes opened."

In the above, "opened" is also an adjective. "Opened" is the past participle of the verb "to open." The past participle of any verb can be used as an adjective, just as it is here.

In as much as both are grammatically correct, idiomatically, people say "open": "Keep your eyes open." If you are having to choose one, "open" or "opened," in a multiple choice, the answer is "open."

Open. Open is present tense, "opened" past tense.