Σήμερα περιμένω περισσότερο στη στάση από ό,τι χτες.

Modern Greek has only one present tense form for both:

• I wait and
• I am waiting

So περιμένω can mean either, depending on context.

In this sentence, Σήμερα περιμένω… most naturally means “Today I am waiting…”, because of the time word σήμερα (today) and the whole situation being “right now / these days”. There is no separate continuous form; simple present covers both uses.

Here περισσότερο is an adverb meaning “more” / “for longer” / “to a greater extent”.

• As an adverb, it modifies the verb περιμένω (I wait / I am waiting).
• Greek doesn’t need to say “περισσότερο χρόνο” (more time) here, because it’s clear from context that we’re comparing how long the waiting lasts.

So:

• περιμένω περισσότερο ≈ “I wait more / I’m waiting for longer”
• If you wanted to be explicit: περιμένω περισσότερο χρόνο = “I wait more time / longer (time)”, but that sounds a bit heavier and is not necessary.

Yes, you can:

• Σήμερα περιμένω πιο πολύ στη στάση από ό,τι χτες.

In everyday speech, περισσότερο and πιο πολύ are often interchangeable and both very common.

Very roughly:

• περισσότερο feels a bit more neutral/standard.
• πιο πολύ feels a bit more conversational.

In this sentence they mean the same thing: I’m waiting longer / more than yesterday.

In comparatives, από means “than”.

Two patterns are possible here:

1. Σήμερα περιμένω περισσότερο στη στάση από χτες.
   = Today I’m waiting more at the stop than yesterday.

2. Σήμερα περιμένω περισσότερο στη στάση από ό,τι χτες.
   Literally: Today I’m waiting more at the stop than what (I did) yesterday.

από ό,τι = “than what…” and introduces an elliptical clause:

• (…από ό,τι περίμενα χτες) = “…than (what) I waited yesterday.”

Both από χτες and από ό,τι χτες are grammatically correct.
Using από ό,τι makes it feel a bit more explicitly clausal (“than what I did yesterday”), but in normal speech the meaning difference is minimal.

These are two different words:

1. ό,τι (with comma)

   • Means “whatever / (the thing) that / what(ever)”.
   • It is a pronoun.
   • Example: Πάρε ό,τι θέλεις. – “Take whatever you want.”

2. ότι (no comma)

   • Means “that” (introducing a clause, like “He said that…”).
   • It is a conjunction.
   • Example: Είπε ότι θα έρθει. – “He said that he will come.”

In από ό,τι χτες, we need the pronoun ό,τι (“what”), because the full meaning is “than what I did yesterday”. That’s why the comma is there: to mark ό,τι (the pronoun), not ότι (the conjunction).

Both are correct; they reflect spoken contraction:

• από ό,τι – full form (more careful/written style)
• απ’ ό,τι – contracted form, very common in speech and informal writing

The vowel -ο in από is dropped before a following vowel (ό), and the apostrophe ’ shows this:

• από + ό,τι → απ’ ό,τι

Pronunciation-wise, they sound almost the same; native speakers use απ’ ό,τι very often.

στη is a contraction of:

• σε (preposition “in / at / to”)
• τη (feminine singular article “the” in the accusative)

So:

• σε + τη στάση → στη στάση = “at the stop” / “at the bus stop”

Greek very often contracts σε + definite article:

• σε + τον δρόμο → στον δρόμο – “in/on the street”
• σε + το σπίτι → στο σπίτι – “at home / at the house”
• σε + την στάση → στη(ν) στάση – “at the stop”

The ν at the end of την / στην is often dropped before certain consonants in modern Greek.

The common rule (especially in writing) is:

• Keep ν before vowels and the consonants π, τ, κ, μπ, ντ, γκ, ξ, ψ and double consonants.
• Drop it before other consonants (like σ, ζ).

Since στάση starts with σ, it is normal to see:

• τη στάση / στη στάση (without ν)

You can also hear στην στάση in speech; keeping or dropping the ν here is mainly a matter of style and rhythm. The form in your sentence, στη στάση, is perfectly standard.

Yes, Greek word order is quite flexible. These are all grammatically fine:

• Σήμερα περιμένω περισσότερο στη στάση από ό,τι χτες.
• Σήμερα στη στάση περιμένω περισσότερο από ό,τι χτες.
• Σήμερα περιμένω στη στάση περισσότερο από ό,τι χτες.

The main difference is which part you emphasize:

• Putting σήμερα first emphasizes “today (as opposed to some other day)”.
• Moving περισσότερο closer to περιμένω can slightly stress the amount more.
• Putting στη στάση earlier can highlight the location more.

All these variations will be understood the same way in everyday conversation.

στάση literally means “stop / standing / station (stop)”, and in everyday modern Greek it usually refers to a public transport stop:

• στάση λεωφορείου – bus stop
• στάση τρόλεϊ – trolleybus stop
• στάση τραμ – tram stop

In many contexts (including this sentence), just η στάση is enough to mean “the (bus) stop”, because it’s clear from daily life what kind of “stop” people are talking about.