Péntek óta levéltetvek vannak a hajtáson.

Péntek óta means since Friday.

• Péntek = Friday
• óta = since

Together they express that something started at that time and is still true now.

So in this sentence, Péntek óta tells us that the aphids have been there continuously from Friday until now.

Yes — in Hungarian, days of the week are normally written in lowercase: péntek.

It is capitalized here only because it is the first word of the sentence.

So inside a sentence, you would normally write:

• péntek óta

but at the beginning:

• Péntek óta

This is very common in Hungarian.

Hungarian often uses the present tense with óta to express something that started in the past and is still continuing now.

So:

• Péntek óta levéltetvek vannak a hajtáson.

can correspond to English:

• There have been aphids on the shoot since Friday.
• There are aphids on the shoot since Friday. → this sounds unnatural in English
• The shoot has had aphids on it since Friday.

So even though Hungarian uses present tense (vannak), English often uses present perfect.

Because levéltetvek is plural.

• van = is / there is for singular
• vannak = are / there are for plural

Compare:

• Levéltetű van a hajtáson. = There is an aphid on the shoot.
• Levéltetvek vannak a hajtáson. = There are aphids on the shoot.

So vannak agrees with the plural noun.

The singular is levéltetű.

• singular: levéltetű = aphid
• plural: levéltetvek = aphids

This plural may look a little unusual because the word changes shape when it becomes plural. It is not just levéltetűk.

So this is a vocabulary item worth memorizing:

• levéltetű
• levéltetvek

Hungarian does not need a separate dummy word like English there in existential sentences.

English says:

• There are aphids on the shoot.

Hungarian simply says:

• Levéltetvek vannak a hajtáson.

The idea of existence is expressed by van / vannak, without adding a separate word for there.

Good question. In Hungarian, van / vannak is often left out in simple equational sentences in the 3rd person present:

• A ház nagy. = The house is big.
• Ő tanár. = He/She is a teacher.

But in existential/location sentences like this one, van / vannak is normally kept:

• A könyv az asztalon van. = The book is on the table.
• Levéltetvek vannak a hajtáson. = There are aphids on the shoot.

So here vannak is necessary.

A hajtáson means on the shoot.

Breakdown:

• hajtás = shoot, sprout, new plant growth
• a = the
• -on = on (surface/location suffix)

So:

• hajtás = shoot
• hajtáson = on the shoot
• a hajtáson = on the shoot

Hungarian often expresses location with a suffix instead of a separate preposition.

Yes. Hungarian uses different case endings depending on the type of location.

Here are some common ones:

• -ban / -ben = in
• -on / -en / -ön = on
• -nál / -nél = at / by

So:

• a házban = in the house
• az asztalon = on the table
• az orvosnál = at the doctor’s

In your sentence, aphids are on the plant shoot, so Hungarian uses the superessive ending -on:

• hajtáson

Because Hungarian uses definite articles much like English does.

• a / az = the

So a hajtáson means on the shoot.

Whether English would use the, a, or sometimes no article at all depends on context, but Hungarian often naturally includes the article when referring to a specific thing already understood in the situation.

Because in Hungarian, plural nouns used in an existential sense often appear without an article.

So:

• Levéltetvek vannak a hajtáson. = There are aphids on the shoot.

This is a natural way to introduce or mention the existence of some aphids, not a specific previously identified set.

If you said a levéltetvek, that would mean the aphids, referring to specific aphids already known in the conversation.

The sentence is:

• Péntek óta levéltetvek vannak a hajtáson.

A simple way to understand it is:

• Since Friday
  • aphids
    • are
      • on the shoot

Hungarian word order is flexible, but this version sounds natural because it starts with the time expression, which sets the scene.

You could also hear other orders, depending on emphasis, for example:

• Levéltetvek vannak a hajtáson péntek óta.
• A hajtáson levéltetvek vannak péntek óta.

These are not random changes; the focus and emphasis shift slightly.

With Péntek óta at the beginning, the sentence gives early prominence to the time frame: since Friday.

But overall, it is still an existential statement about aphids being on the shoot.

Hungarian word order often helps show what the speaker wants to foreground. Starting with Péntek óta makes the duration especially relevant.

Yes, that is possible.

• A hajtáson vannak levéltetvek. = There are aphids on the shoot.

This version puts the location first, so it may sound more like you are talking specifically about what is on the shoot.

Your original sentence,

• Péntek óta levéltetvek vannak a hajtáson,

highlights the fact that this has been the case since Friday.

So both are grammatical, but the emphasis is a little different.

Yes, typically.

Examples:

• két nap óta = since two days ago / for two days
• hétfő óta = since Monday
• tavaly óta = since last year

So Péntek óta follows the normal pattern: time expression + óta.

In many contexts, yes.

Hungarian óta marks a starting point in the past that continues up to the present. In English, this may be translated either with since or sometimes with for, depending on how the time is expressed.

Examples:

• péntek óta = since Friday
• két napja often means for two days
• két nap óta can also express for two days / since two days ago

So óta is most literally like since, but English translation depends on the phrase.

Hajtás usually means a shoot, sprout, or new growth on a plant.

So the sentence is talking about aphids being on a plant shoot or growing stem. That fits well with real-life usage, since aphids often gather on tender new growth.

Yes. It sounds natural and idiomatic.

A Hungarian speaker would understand it as something like:

• There have been aphids on the shoot since Friday.
• The shoot has had aphids on it since Friday.

So it is a good example of:

• óta for ongoing time from a past point
• van/vannak in an existential sentence
• a location suffix like -on

You would use the singular noun and singular verb:

• Péntek óta levéltetű van a hajtáson.

That means:

• There has been an aphid on the shoot since Friday.

Changes:

• levéltetvek → levéltetű
• vannak → van

You could say:

• Péntek óta a levéltetvek a hajtáson vannak.

This uses a levéltetvek = the aphids, so now you are referring to specific aphids.

That structure is less neutral than the original and is more about those particular aphids. The original sentence is more naturally existential:

• Péntek óta levéltetvek vannak a hajtáson. = There have been aphids on the shoot since Friday.

So the original is usually the more natural choice when simply reporting the presence of aphids.