Verbseoul.
하다 verb
생각하다saenggakhadato think

To say to think politely in the present tense, use 생각해요 (saeng-gah-kae-yoh). Below is the full conjugation of 생각하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
생각해
saeng-gah-kae
생각해요
saeng-gah-kae-yoh
생각합니다
saeng-gah-kahm-nee-dah
Past
생각했어
saeng-gah-kae-ssuh
생각했어요
saeng-gah-kae-ssuh-yoh
생각했습니다
saeng-gah-kae-sseum-nee-dah
Future
생각할 거야
saeng-gah-kahl- -guh-yah
생각할 거예요
saeng-gah-kahl- -guh-yae-yoh
생각할 겁니다
saeng-gah-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
생각하세요
saeng-gah-kah-sae-yoh
Suggestion / Let's Polite (요)
생각해요
saeng-gah-kae-yoh
Question Polite (요)
생각해요?
saeng-gah-kae-yoh-?
Connective “and” — (고)
생각하고
saeng-gah-kah-goh
Conditional “if” — (면)
생각하면
saeng-gah-kah-myuhn
Noun form — (기)
생각함
saeng-gah-kahm