KOREAN VERB

의심하다

to doubt

Conjugation

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현재 · now and habits: polite, formal and casual speech

Form	Polite	Formal	Casual
AffirmativeI doubt
NegativeI don’t doubt

과거 · finished actions: 갔어요, 갔습니다, 갔어

Form	Polite	Formal	Casual
AffirmativeI doubted
NegativeI didn’t doubt

미래 · plans and guesses: -(으)ㄹ 거예요

Form	Polite	Formal	Casual
AffirmativeI will doubt
NegativeI won’t doubt

높임말 · to or about an elder: the -시- forms

Form	Polite	Formal
PresentI doubt (respectfully)
PastI doubted (respectfully)
FutureI will doubt (respectfully)

연결 어미 · and, so, if, because, but: joining two sentences

명령형 · -(으)세요, -(으)십시오, the casual form, -지 마세요

One sentence for each tense, the way people say it.

Present

저는 그 사람 말을 좀 의심해요.

I doubt what that person says a bit.
Past

처음에는 저도 그 소식을 의심했어요.

At first I doubted that news too.
Future

증거가 없으면 사람들이 의심할 거예요.

Without proof, people will doubt it.
Honorific

할머니는 텔레비전 광고를 항상 의심하세요.

Grandma always doubts TV ads.
Connectives

친구를 의심하면 사이가 금방 나빠져요.

If you doubt a friend, the friendship quickly goes bad.
Requests and commands

저를 의심하지 마세요, 정말 진짜예요.

Don't doubt me, it's really true.

의심하다 is to doubt or suspect someone; 의심스럽다 is for something that looks suspicious.

The same pattern, on other verbs: 하다 verb.