Potential Forms: Ability, Permission, and Inherent Possibility

Core examples: 読める, 食べられる, 入れる, できます, 使えます, 見られます, ここで写真が撮れます.

“Can” hides too much

English “can” covers many meanings:

• I can read Japanese.
• Can I enter?
• You can use this card.
• This door can open.
• You can take photos here.

Japanese potential forms also cover several domains, but they do not map perfectly to English.

The key principle is:

Potential expressions can indicate ability, permission, availability, or inherent possibility. Context tells which one.

A learner who translates every potential as “can” may miss whether the issue is skill, rule, physical possibility, system availability, or social acceptability.

Forming potential verbs

Godan verbs:

読む → 読める 書く → 書ける 話す → 話せる

Ichidan verbs:

食べる → 食べられる 見る → 見られる

In casual speech, ら抜き forms like 食べれる and 見れる are common, but standard forms retain ら in formal contexts.

Irregular:

する → できる 来る → 来られる

Ability

Skill or capacity:

日本語が読めます。 I can read Japanese.

泳げます。 I can swim.

漢字が書けません。 I cannot write kanji.

Notice が often marks the thing possible:

日本語が読める

Potential verbs often behave more intransitively than their base transitive forms.

Permission

Potential can indicate permission or allowed action:

ここに入れますか。 Can I enter here? / Is entry allowed?

ここで写真が撮れます。 You can take photos here.

This may not be about skill. Everyone knows how to take a photo. The question is whether the place allows it.

Availability and system possibility

Potential can mean a system or object is available for use:

このカードは使えます。 This card can be used / works here.

Wi-Fiが使えます。 Wi-Fi is available.

予約できます。 Reservations are possible.

This is practical in signs, websites, apps, and service interactions.

Inherent possibility

Potential can describe whether something is physically or structurally possible.

この窓は開けられます。 This window can be opened.

この道は通れません。 This road cannot be passed.

The issue is not a person’s skill but the object/situation’s possibility.

見られる ambiguity

Forms ending in られる can be potential, passive, or honorific depending on context.

映画が見られる。 One can watch the movie.

多くの人に見られる。 It is seen by many people.

先生が来られる。 The teacher comes. / honorific

Context is essential.

できる

できる is a general ability/possibility verb.

日本語ができます。 I can do/speak Japanese.

予約ができます。 Reservation is possible.

準備ができました。 Preparation is ready.

できる is extremely useful, but it can be vague. Specific potential verbs often sound more precise.

Example bank walkthrough

読める

Can read.

Learner action: ability potential.

食べられる

Can eat / edible / can be eaten depending context.

Learner action: distinguish potential/passive.

入れる

Can enter or put in, depending verb identity/context.

Learner action: watch ambiguity with 入る potential and 入れる transitive verb.

できます

Can do / possible / ready.

Learner action: context decides meaning.

使えます

Can use / available.

Learner action: common in signs and services.

見られます

Can see/watch, is seen, or honorific depending context.

Learner action: parse carefully.

ここで写真が撮れます

Permission/availability.

Learner action: not about camera skill.

Potential parse routine

Ask:

1. What is the base verb?
2. Is the form potential, passive, or honorific?
3. Is the issue skill?
4. Is it permission?
5. Is it availability?
6. Is it physical possibility?
7. What noun is marked with が?
8. Would できる or a specific potential verb be more natural?

Potential forms are not only ability

The English word “can” hides several meanings. Japanese separates them more clearly, but potential forms still need context.

日本語が読めます。 I can read Japanese.

This is ability.

ここで写真が撮れます。 You can take photos here.

This may mean permission or practical possibility.

このアプリで予約できます。 You can make reservations with this app.

This is system availability.

The learner must ask: what kind of “can” is this?

Potential verbs and が

Potential expressions often use が where English expects an object.

本を読む。 read a book

本が読める。 can read the book / the book is readable

The object-like thing becomes marked by が because the sentence describes possibility/ability concerning that item.

This is not always a hard rule—を can appear in some potential contexts—but が is central and should be learned early.

できる versus verb potential

Both can express ability.

日本語ができます。 I can do/speak Japanese.

日本語が話せます。 I can speak Japanese.

できる is broader and often attaches to nouns or suru-verbs:

勉強できる can study

予約できる can reserve

Verb potential is more specific:

読める can read

行ける can go

食べられる can eat

Permission versus ability

入れます。

This can mean “can enter” or “may enter,” depending on context.

On a sign:

ここから入れます。 You can enter from here.

In a rule context, it may indicate permission. In a physical context, it may indicate possibility.

To explicitly ask permission, Japanese may use:

入ってもいいですか。 May I enter?

Do not rely on potential alone when you need clear permission.

Inherent possibility and availability

Potential forms often describe whether something is available or possible because of circumstances.

この店ではカードが使えます。 You can use cards at this shop.

駅から歩いて行けます。 You can go on foot from the station.

この動画は日本では見られません。 This video cannot be viewed in Japan.

The subject may not be a person’s skill. It may be the system or situation.

Potential form ambiguity: 食べられる

食べられる

can mean:

• can eat,
• can be eaten,
• is edible,
• is eaten, in passive contexts.

Context decides.

私は寿司が食べられます。 I can eat sushi.

この魚は食べられます。 This fish is edible.

魚が猫に食べられました。 The fish was eaten by the cat.

れる/られる forms require careful parsing.

Potential parsing routine

1. Is the form potential, passive, honorific, or ambiguous?
2. Is there an ability holder?
3. Is there a rule or permission context?
4. Is this about system availability?
5. Is the item marked with が?
6. Would 〜てもいい be clearer for permission?
7. Does context imply passive instead?

Potential grammar is event possibility, not just personal skill.

A strong tool for this article would classify “can” meanings.

Suggested functions:

1. Form generator: 読む → 読める, 食べる → 食べられる.
2. Meaning categories: ability, permission, availability, inherent possibility.
3. Ambiguity warning: られる forms.
4. Sign-reading mode: 使えます, 撮れます, 入れません.
5. Particle notes: が with potential.
6. Translation practice: choose natural English based on context.

Final rule

Potential forms do not simply mean “can.” They show possibility in context.

Ask what kind of possibility is at stake: skill, permission, availability, physical possibility, or social acceptability. Watch られる ambiguity. Learn signs and service phrases carefully.

Potential grammar is possibility grammar.