How Japanese Object Sentences Use を, ます, and ません

を marks the direct object

In a basic Japanese action sentence, the particle を follows the noun that receives the action:

$$\text{object} + を + \text{verb}$$

For example, りんごをたべます means “I eat an apple” or “I will eat an apple,” depending on context. The particle is written を but is pronounced like お in modern standard Japanese.

ます and ません form a polite contrast

The ます form makes a verb polite and non-past. Its negative counterpart is ません:

So パンをたべません means “I do not eat bread,” while しんぶんをよみます means “I read a newspaper.”

The actor can be omitted

Japanese often leaves out an actor that listeners can infer. わたしはラジオをききます is complete, but ラジオをききます is also natural when “I” is already understood. When the actor needs to be stated explicitly, a topic phrase such as わたしは can be added. Here, は marks the phrase as the topic; it is not a general-purpose subject marker.

Check meaning as well as grammar

A sentence can have the right particles and endings but still pair an object with an unsuitable verb. Check in this order:

1. Is the action appropriate for the noun?
2. Does を immediately follow the direct object?
3. Does the verb use ます for the required affirmative or ません for the required negative?
4. Is an omitted actor clear from context?

This routine works for workbook exercises and for original sentences beyond a memorized answer key.