Verbseoul.
하다 verb
미행하다mihaenghadato follow, to trail, to shadow (a person)

To say to follow, to trail, to shadow (a person) politely in the present tense, use 미행해요 (mee-haeng-hae-yoh). Below is the full conjugation of 미행하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
미행해
mee-haeng-hae
미행해요
mee-haeng-hae-yoh
미행합니다
mee-haeng-hahm-nee-dah
Past
미행했어
mee-haeng-hae-ssuh
미행했어요
mee-haeng-hae-ssuh-yoh
미행했습니다
mee-haeng-hae-sseum-nee-dah
Future
미행할 거야
mee-haeng-hahl- -guh-yah
미행할 거예요
mee-haeng-hahl- -guh-yae-yoh
미행할 겁니다
mee-haeng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
미행하세요
mee-haeng-hah-sae-yoh
Suggestion / Let's Polite (요)
미행해요
mee-haeng-hae-yoh
Question Polite (요)
미행해요?
mee-haeng-hae-yoh-?
Connective “and” — (고)
미행하고
mee-haeng-hah-goh
Conditional “if” — (면)
미행하면
mee-haeng-hah-myuhn
Noun form — (기)
미행함
mee-haeng-hahm