V+到 (dou2)

In Cantonese, action verbs by themselves often express only the effort or attempt.

1. Attempt vs. Attainment
To show that an effort successfully reached its goal, attach 到 (dou2) directly after the verb:

• 搵 (wan2) [look for] → 搵到 (wan2 dou2) [find]
• 聽 (teng1) [listen] → 聽到 (teng1 dou2) [hear / catch the sound]
• 買 (maai5) [buy] → 買到 (maai5 dou2) [manage to buy / successfully acquire]

Sensory verbs usually take 到 as a complement to move from an action to actual perception (e.g., 睇 tai2 'look' → 睇到 tai2 dou2 'see'; 聞 man4 'smell' → 聞到 man4 dou2 'catch the scent'). Note that while 到 is a general complement of attainment, 見 (gin3) is a specific complement used almost exclusively for visual and auditory perception (e.g., 睇見 tai2 gin3, 聽見 teng1 gin3).

2. Accidental Attainment
The pattern V + 到 is also used for accidental or unintentional encounters. For example:

• 撞 (zong6) [bump] → 撞到 (zong6 dou2) [bump into accidentally]
• 踩 (caai2) [step] → 踩到 (caai2 dou2) [step on by accident]
• 執 (zap1) [pick up] → 執到 (zap1 dou2) [pick up by chance]

3. Phonology and Tone
As a resultative particle of attainment, 到 undergoes tone change to Tone 2 (dou2) in standard spoken Cantonese. This distinguishes it from Tone 3 (dou3), which is used for the verb/preposition 'to arrive' or the extent complement.

4. Word Order and Disambiguation
When adding a direct object, place it directly after the complement pattern (Verb + 到 + Object):

• 搵到地方 (wan2 dou2 dei6 fong1) [found / can find a place]
• 買到飛 (maai5 dou2 fei1) [managed to buy / can buy tickets]

Bare V + 到 can indicate either a completed attainment or potential ability depending on context. Because the resultative complement 到 (dou2) inherently encodes successful attainment, the completion of the action is already implied. Past completion is usually expressed with the bare pattern V + 到 or by adding the sentence-final particle 喇 (laa3) (e.g., 搵到喇 wan2 dou2 laa3 'I finally found it!'). Note that the perfective marker 咗 (zo2) implies successful completion for standard verbs (like 買 maai5 'buy'), but for conative verbs (verbs of trying, like 搵 wan2 'look for'), 搵咗 (wan2 zo2) only means the attempt was made, not necessarily attained. Colloquially, native speakers also combine them as V + 到 + 咗 (e.g., 搵到咗 wan2 dou2 zo2) to emphasize that the attainment is fully completed.

5. Affirmative and Negative Potential
To express affirmative potential ability ('can manage to V'), a standard Cantonese structure is V + 得 (dak1) + 到 (e.g., 睇得到 tai2 dak1 dou2 'able to see'). You can also use the shorter form V+到 (dou2) depending on context.

To express inability ('cannot manage to V'), insert 唔 (m4) between the verb and 到 to form V+唔到 (V m4 dou2). Just like the affirmative form, the object follows the entire complement:

• 睇唔到字 (tai2 m4 dou2 zi6) = unable to see / cannot see the words

To express past failure or that you didn't manage to do something, use 冇 (mou5) + V + 到, again placing the object at the end:

• 冇買到飛 (mou5 maai5 dou2 fei1) = didn't manage to buy tickets

6. Asking Questions
To ask if someone can manage to do something, use the A-not-A form V-唔-V到 (e.g., 睇唔睇到？ tai2 m4 tai2 dou2? 'Can you see it?'). To ask if someone successfully did something in the past, use 有冇 (jau5 mou5) + V + 到 (e.g., 有冇睇到？ jau5 mou5 tai2 dou2? 'Did you see it?'). To ask if someone has successfully completed an action yet, use the pattern Verb + 到 + Object + 未呀？ (e.g., 買到飛未呀？ maai5 dou2 fei1 mei6 aa3? 'Have you managed to buy the tickets yet?').

Note that 到 (dou2) is an attainment and potential marker, not strictly a past tense marker. It can refer to future or hypothetical success (e.g., 聽日我一定買到 ting1 jat6 ngo5 jat1 ding6 maai5 dou2 'Tomorrow I will definitely manage to buy it').