Verbseoul.
하다 verb
관찰하다gwanchalhadato observe

To say to observe politely in the present tense, use 관찰해요 (gwahn-chahl-hae-yoh). Below is the full conjugation of 관찰하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
관찰해
gwahn-chahl-hae
관찰해요
gwahn-chahl-hae-yoh
관찰합니다
gwahn-chahl-hahm-nee-dah
Past
관찰했어
gwahn-chahl-hae-ssuh
관찰했어요
gwahn-chahl-hae-ssuh-yoh
관찰했습니다
gwahn-chahl-hae-sseum-nee-dah
Future
관찰할 거야
gwahn-chahl-hahl- -guh-yah
관찰할 거예요
gwahn-chahl-hahl- -guh-yae-yoh
관찰할 겁니다
gwahn-chahl-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
관찰하세요
gwahn-chahl-hah-sae-yoh
Suggestion / Let's Polite (요)
관찰해요
gwahn-chahl-hae-yoh
Question Polite (요)
관찰해요?
gwahn-chahl-hae-yoh-?
Connective “and” — (고)
관찰하고
gwahn-chahl-hah-goh
Conditional “if” — (면)
관찰하면
gwahn-chahl-hah-myuhn
Noun form — (기)
관찰함
gwahn-chahl-hahm