Japanese permission and prohibition with te forms

01 / Understand

Ask whether your action is acceptable

In ここに座ってもいいですか, the speaker asks whether sitting here is acceptable. The listener is being asked for permission, not instructed to sit. Build the verb’s te form, then attach もいいですか. The question ending belongs to the whole permission expression.

Context determines whose action is under discussion, although the speaker’s proposed action is a common default in a direct request for permission. If the actor could be unclear, name them or clarify the situation. A correct ending cannot compensate for asking the wrong person about a rule they do not control.

A permission question can concern an action that is physically possible but socially restricted. A person may be able to open a door yet still need approval to enter a room. That is why ability and permission should be separated in the reasoning. The question here asks about acceptability within the stated situation. It does not claim that any real library, classroom, or public place has a particular rule; fictional scenarios supply the rule for practice.

02 / Understand

Preserve the complete te form

Verb class still determines the joining form. 使う gives 使って, 読む gives 読んで, and する gives して. The permission pattern therefore includes both ても and でも, depending on the verb. 読んでもいいですか is not a different permission rule.

Keep the small consonant timing in 使って and the voiced ending in 読んで. A useful construction routine is to say the te form alone, check it, and only then add the permission phrase. This reduces errors caused by trying to attach an entire memorized string directly to the dictionary form.

The verb 行く is a useful exception to remember because its te form is 行って. A permission question about going therefore uses 行ってもいいですか. Do not build iite from the ordinary pattern for a verb such as kaku. Exceptions are manageable when tied to a complete useful utterance. Say the whole permission question, then identify the exceptional te form inside it so that pronunciation and grammatical analysis reinforce each other.

03 / Understand

Grant permission without ordering the action

A response such as はい、どうぞ grants permission in the stated setting. It does not require the person to perform the action. Similarly, 使ってもいいです says using it is allowed. 使ってください asks or instructs the listener to use it. These can be appropriate in different situations, but they do different conversational work.

Distinguish a possibility from an obligation when translating. English can in a permission context is different from must. If you are describing an optional tool at a class, permission wording leaves the choice open. If the exercise requires that tool, an instruction communicates the requirement more directly.

A permission statement can refer to a group as well as an individual. If a classroom exercise allows all students to use a dictionary, the subject or topic can make that group explicit. The permission remains optional unless another instruction adds a requirement. This distinction matters for understanding directions: a learner who interprets every allowed tool as compulsory may perform the task differently from what the speaker intended. Check whether the sentence grants a choice or requests an action.

04 / Understand

State a prohibition with appropriate authority

Te form plus はいけません states that an action is unacceptable or prohibited. ここで写真を撮ってはいけません means photos must not be taken here. The は is written ha but pronounced wa as the particle. A polite final form does not make the content weak.

Direct prohibitions can sound strong. They fit explaining a rule or speaking from a role that authorizes the instruction. Do not use them casually to control another adult’s harmless choice. When a personal inconvenience is at stake, a considerate request or explanation can better express the relationship. This is a language distinction, not a claim about any real place’s rules.

When reading a prohibition, locate the complete forbidden action. A place phrase can limit where the prohibition applies, while a time phrase can limit when. A sentence about eating in this room does not logically forbid eating everywhere. Preserve that scope in your English paraphrase. The negative force is strong, but its scope still depends on the words in the sentence. Overgeneralizing a local restriction is a comprehension error, even if the prohibition ending is recognized correctly.

05 / Understand

Keep a negative request separate

A negative request uses the plain negative plus でください: ここに書かないでください, please do not write here. This asks the listener to refrain. It can support a rule, but it need not be a statement of a general prohibition. The reason may be a temporary practical need.

The forms are easy to confuse because both contain a verb and a negative idea. Permission uses an affirmative te form before the permission expression. A negative request uses the negative verb before でください. Do not put ない into every construction merely because the intended English sentence contains not.

Negative requests can also express care or reassurance, not only restriction. 心配しないでください asks someone not to worry. The form remains a negative request, but the communicative purpose is supportive. This is another reason not to translate every nai de kudasai sentence as a stern rule. Identify the action and the relationship. A request to refrain from worrying has a different practical force from an instruction not to touch a device during a demonstration.

06 / Understand

Ask whether an alternative is acceptable

A noun alternative can use でもいいですか. At a form desk, ペンでもいいですか asks whether a pen is acceptable for the established writing task. The action is recoverable from context. If it is not, make it explicit with ペンで書いてもいいですか.

These expressions are not interchangeable simply because they contain で. In the full sentence, ペンで marks the writing instrument. In the shorter alternative question, the noun is the proposed option. Context connects the pen to the task, so do not use a bare noun alternative when the listener cannot infer what you plan to do with it.

An acceptable alternative often presupposes an original expectation. Asking whether tomorrow is acceptable may arise when today was expected, and asking whether a pen is acceptable may arise when pencil was expected. The noun alternative pattern does not itself supply that background. If the listener has not heard the earlier task, state the action explicitly. This keeps an efficient short expression from becoming a puzzle that depends on information only the speaker knows.

07 / Understand

Clarify refusal and retry the decision

A refusal may be indirect, such as ちょっと, or explained through circumstances. Do not treat a hesitant answer as definite permission. A learner can seek a clear alternative by naming a different place, time, or item. A refusal of this option does not automatically prohibit every related option.

In the game, identify the actor, the proposed action, and whether the utterance asks, allows, or forbids. The wrong choices often remain grammatical but reverse the purpose. After checking feedback, produce the permission question without choices. Then state a rule for a fictional classroom and explain the difference between those two messages.

A useful clarification preserves the action but changes one condition. If taking photographs is not allowed here, you might ask about another area; if using a tool now is inconvenient, ask about a later time. The exercise is to identify exactly what the refusal covers. Do not repeatedly restate the same question as if a different conjugation would change the answer. Language learning includes respecting the information already given and asking a genuinely new clarification.

Notice the difference

Common mistakes

From understanding to using

Make your own example.

Try these without answer choices. Say your answer aloud or write it below, then compare your reasoning with the model.