A phrasal verb is a verb paired with one or two small words, usually a preposition like up, out, off, on, over, that together mean something the verb alone doesn't. "Give up" has almost nothing to do with "give." "Run into" someone has nothing to do with running. That gap between the literal words and the meaning is the reason phrasal verbs get their name instead of just being "verbs with extra words attached."
English has somewhere between 5,000 and 10,000 of them, depending on how loosely you count. You will not need all of them. You will need around a thousand (yes, one thousand!) that show up constantly in meetings, emails, and small talk; and those are exactly the ones most courses find hard to teach, because they're more difficult to understand and test than grammar rules.
Why "advanced" learners get stuck here
This is the part that surprises people: phrasal verbs are not usually a beginner problem. They're a late-stage problem for learners who want to obtain fluency and sound like themselves in English. For example, someone who has been speaking English for fifteen years, who can handle contracts and conditionals without blinking, can still freeze on the difference between put off, put up with, and put down. That's because grammar has rules you can study. Phrasal verbs mostly don't, or let's say they have rules that can't be easily taught; rules that are strongly linked with the cultural and emotional connotation of a word and its meaning in context. Those "rules" come intuitively to native speakers but are hard to understand for non-native speakers. Most courses offer long lists to memorize as the solution. Well, most learners don't do well with long lists of anything especially busy professionals who want results quickly and simply don't have time for rote memorization. Thus, many people somehow get by (survive). They guess a phrase's meaning in a client meeting and avoid using advanced vocabulary like phrasal verbs all together. The good news is that for mere survival this works. The bad news is that you will still not feel like yourself, like you belong in the room, and you will miss opportunities, lots of them, sometimes just because you missed a word, or because you didn't sound natural. Should it be like this? No, but the world is a very competitive place, and you can't afford to be left behind because you sound off to someone's ears.
And you simply can't avoid phrasal verbs because they cluster heavily in workplace English specifically. Meetings run on them. Trust is built more easily with them, and doors open more quickly.
- follow up — contact someone again about something unresolved. "I'll follow up with legal by Friday."
- circle back — return to a topic later. "Let's circle back to budget once Sam joins."
- flesh out — add detail to a rough idea. "Can you flesh out slide three before Thursday?"
- run something by — get informal approval or a reaction. "I want to run this by you before I send it."
- hold off — delay an action on purpose. "Let's hold off on the announcement until Monday."
- touch base — make brief contact to check in. "I'll touch base once the numbers come in."
None of these phrasal verbs are slang. None of them are informal in a way that would be out of place in an email to a client. They're just how the language works, and a learner who only knows contact, return to, delay, or has to describe the action of "touch base" in two sentences isn't wrong, exactly. They just sound like they learned English from a manual. They don't sound fluent.
Literal, idiomatic, and everything in between
Phrasal verbs sit on a spectrum, and it helps to know where a given one falls:
- Mostly literal: sit down, stand up, come in. The meaning is close to the individual words. These rarely create problems.
- Partly idiomatic: fill out (a form), check in (to a hotel). You can see the logic once you know the answer.
- Fully idiomatic: give up, pull off, bring up. No amount of staring at the individual words gets you there. You either know it, or you don't.
And then there are the ones that have an idiomatic AND a literal meaning: run into, come across and so on.
Fluency is built at the intersection of all the above, and this is also where a lot of learning material gives up and provides you with lists and, maybe, some examples.
Why they're worth learning as phrases in context, not word-by-word
The mistake we often see, including from people who are otherwise excellent English speakers, is trying to reconstruct a phrasal verb from its parts. It doesn't work, because the meaning can't be found in the different parts. "Bring up" a topic and "bring up" a child share zero semantic overlap with each other, let alone with "bring." The only reliable way is to learn the entire unit (the verb, the particle, the meaning, and ideally a sentence you can feel in your mouth for context).
That's a deliberately narrow, repetition-heavy kind of learning, which is a big part of why Phrasely exists: 200+ phrasal verbs and idioms in the first Business English track alone, taught the way an experienced language coach would teach them in context, with the register and tone that tells you when a phrase is fine in a client email and when it's strictly a Slack-with-your-team kind of phrase.
A few quick answers
Is "find out" a phrasal verb? Yes. Verb ("find") plus particle ("out"), and the combined meaning (to discover something) isn't really "found" in either word alone.
What's the difference between a phrasal verb and a prepositional verb? In practice, not much that matters day to day. Grammarians distinguish them by whether the small word is a true particle or a preposition attached to an object (compare turn it off vs. look after it. You can't say look it after). For learning purposes, both behave the same way: memorize the unit, not the pieces.
Are phrasal verbs formal or informal? Both, and that's the cultural trap. Hang out is casual. Follow up is standard in any client email. The only way to know which register a phrasal verb belongs to is to learn it with context attached, not in an alphabetical list.
If you want the phrasal verbs that actually come up at work, in the order native speakers reach for them, that's most of what we've built. Join the waitlist and we'll let you know the moment Phrasely becomes available.