Новая грамматическая тема: конструкция «вряд ли» выражает сомнение или низкую вероятность.

The closest natural translations are:

• probably not
• unlikely
• I doubt it
• hardly likely

The exact English choice depends on context. For example:

• Он вряд ли придёт. → He probably won’t come / He’s unlikely to come.
• Вряд ли. → I doubt it.

So вряд ли does not simply mean a factual no. It expresses doubt or low probability.

It is written as two words: вряд ли.

This is a fixed expression, so learners should memorize it as a single unit in meaning, even though it is spelled separately.

For practical learning purposes, it is best to treat вряд ли as a fixed modal expression or particle-like phrase that shows the speaker’s attitude toward what follows.

In other words, it does not describe an action like a normal adverb such as быстро or хорошо. Instead, it adds the idea:

• I doubt that...
• It is unlikely that...

So the most useful approach is: learn it as a ready-made construction.

It usually comes before the part of the sentence it comments on, very often near the beginning:

• Он вряд ли придёт.
• Я вряд ли смогу помочь.
• Вряд ли они уже дома.

Very often, Russian places it before the verb or before the whole clause.

A good default pattern is:

• subject + вряд ли + verb

For example:

• Она вряд ли знает ответ.

But Russian word order is flexible, so you may also see:

• Вряд ли она знает ответ.

Both are normal.

Usually, no.

Because вряд ли already expresses a negative idea of probability, Russian normally says:

• Он вряд ли придёт.

Not:

• Он вряд ли не придёт.

The second version is only used if you specifically mean:

• It is unlikely that he will not come

That is a different meaning.

So the basic rule is:

• вряд ли + affirmative verb form = probably not / unlikely

Examples:

• Я вряд ли успею. = I probably won’t make it in time.
• Она вряд ли согласится. = She’s unlikely to agree.

Yes. It can be used with past, present, and future, depending on what you are talking about.

Examples:

• Он вряд ли знает. = He probably doesn’t know.
• Он вряд ли знал. = He probably didn’t know.
• Он вряд ли узнает. = He probably won’t find out / is unlikely to find out.

So вряд ли itself does not change form. The tense is shown by the verb.

Yes. Very commonly.

• Ты думаешь, он согласится?
  — Вряд ли.

This means something like:

• Unlikely.
• I doubt it.
• Probably not.

This is a very natural and frequent use.

Historically, yes, but in modern Russian вряд ли should be learned as a fixed expression.

That means you should not normally analyze it piece by piece while speaking. Just memorize:

• вряд ли = unlikely / I doubt it

So even though ли exists elsewhere in Russian as a particle, in this expression the whole phrase works together.

They point in opposite directions.

• наверное = probably
• вряд ли = probably not / unlikely

Compare:

• Он, наверное, придёт. = He will probably come.
• Он вряд ли придёт. = He probably won’t come / He’s unlikely to come.

So if наверное suggests a fairly likely event, вряд ли suggests low probability.

They are very close in meaning. Both can mean:

• hardly
• unlikely

Examples:

• Он вряд ли придёт.
• Он едва ли придёт.

Both mean that his coming is unlikely.

However, вряд ли is generally the more common everyday choice for many learners to start with. Едва ли can sound a bit more bookish or formal in some contexts, though it is still perfectly normal Russian.

Not quite. It is usually strong doubt, but still about probability, not absolute impossibility.

So:

• Нет = a direct no
• невозможно = impossible
• вряд ли = unlikely / I doubt it

This matters because вряд ли leaves open a small possibility.

For example:

• Вряд ли он сможет помочь.
  This means you doubt he will be able to help, but you are not saying it is absolutely impossible.

Yes, very often. One common pattern is:

• вряд ли + future/present form
• вряд ли + modal-like meaning with infinitive in the clause

Examples:

• Я вряд ли смогу прийти. = I probably won’t be able to come.
• Он вряд ли хочет спорить. = He probably doesn’t want to argue.
• Вряд ли стоит ждать. = It’s hardly worth waiting / We probably shouldn’t wait.

So you will often see it in sentences where the main idea is possibility, ability, intention, or advisability.

It is neutral and very common. You can use it in everyday speech, writing, and standard conversation.

It is not slang, and it is not especially formal. That makes it a very useful expression to learn early.

A very useful model is:

• Subject + вряд ли + verb

Examples:

• Я вряд ли успею.
• Он вряд ли поймёт.
• Мы вряд ли сможем помочь.

You can also remember the short-answer pattern:

• — ...?
• — Вряд ли.

Those two patterns will cover a large number of real situations.