Why Can I Understand English but Struggle to Speak It?

Many English learners experience the same frustration: they can understand a film, follow a conversation, read an article or recognise a lot of vocabulary — but when it is their turn to speak, the words suddenly seem to disappear.

This can feel confusing, but it is actually a very normal part of language learning.

Understanding and speaking are related skills, but they are not the same skill. Being able to recognise English does not automatically mean being able to produce it quickly and confidently.

So why does this happen?

1. Understanding is easier than producing

When you listen or read, the language is already there in front of you.

Your job is to recognise meaning.

When you speak, however, you need to do several things at the same time: decide what you want to say, find the right vocabulary, choose appropriate grammar, pronounce the words and organise your ideas — often within a few seconds.

That makes speaking cognitively more demanding.

You may therefore understand a word immediately when you hear it but struggle to retrieve that same word when you need it yourself.

2. Your passive vocabulary is bigger than your active vocabulary

Most learners know more words than they regularly use.

This is the difference between passive and active vocabulary.

Passive vocabulary includes words and expressions you recognise when reading or listening.

Active vocabulary includes the language you can retrieve and use spontaneously when speaking or writing.

For example, you may understand expressions such as “That makes sense”, “I’m not entirely convinced” or “It depends on the situation”, but still rely on simpler phrases such as “Yes”, “No” or “I think…” when speaking.

The solution is not only to learn more vocabulary, but to activate the vocabulary you already know.

3. You may not have enough speaking practice

It is possible to spend a lot of time studying English without spending much time actually speaking it.

You might read articles, complete grammar exercises, watch series and listen to podcasts. All of these activities are useful, but they mainly develop receptive knowledge.

Speaking improves through speaking.

If you want language to become available more quickly, you need repeated opportunities to retrieve it and use it in real time.

4. You may be translating in your head

Many learners first formulate an idea in Spanish and then try to translate it into English.

This is understandable, but it can slow down communication considerably.

The problem becomes greater when the two languages express an idea differently. You may know exactly what you want to say in Spanish but struggle to construct an equivalent sentence in English.

Over time, the goal is to develop stronger direct connections between ideas and English expressions.

Learning complete phrases can help with this. Instead of translating word by word, you begin to retrieve ready-made chunks such as:

“It depends on…”

“As far as I know…”

“The main reason is…”

“What I mean is…”

These expressions give you a framework for building your answer.

5. You may be trying to speak perfectly

Sometimes the problem is not a lack of English, but excessive self-monitoring.

You may start thinking:

“Is this tense correct?”

“Should I use ‘do’ or ‘make’?”

“Is that word too informal?”

“What if I pronounce this incorrectly?”

By the time you have checked everything mentally, the conversation has already moved on.

Accuracy matters, but fluent communication requires you to tolerate some uncertainty.

You do not need to produce a perfect sentence every time you speak.

6. You need more automatic language

Fluent speakers do not construct every sentence from scratch.

A large amount of language is stored and retrieved in familiar combinations.

Think about phrases such as:

“To be honest…”

“I’m not sure, but…”

“That’s a good point.”

“I hadn’t thought about it that way.”

These expressions can be used almost automatically, leaving more mental capacity available for the actual content of what you want to say.

This is one reason why learning phrases and collocations is often more useful than memorising individual words.

7. Speaking involves pressure that listening does not

When you are listening to a podcast, you can simply concentrate on understanding.

When you are speaking to another person, there are additional pressures.

You may worry about being judged, making mistakes, taking too long to answer or not understanding the other person’s response.

This anxiety can make it harder to retrieve language that you actually know.

For some learners, the issue is therefore partly linguistic and partly psychological.

Building confidence through repeated, low-pressure speaking practice can make a significant difference.

So how can you improve?

The key is to practise turning the English you understand into English you can actively use.

Some useful strategies include:

• Retell something you have just read or watched in your own words.

• Record yourself speaking for one or two minutes on a familiar topic.

• Reuse new expressions deliberately in different conversations.

• Practise common phrases as complete chunks rather than isolated words.

• Answer questions aloud instead of only thinking about the answer.

• Repeat a speaking task and try to express the same ideas more fluently the second time.

• Focus on communicating your message first, then review accuracy afterwards.

You can also try a simple exercise: after watching a short video in English, turn it off and explain what happened out loud.

This forces you to move from recognition to retrieval.

Understanding is an important first step

If you understand much more English than you can speak, that is not a sign that you have failed to learn the language.

In fact, it usually means that a substantial amount of knowledge is already there.

The next stage is learning to access that knowledge more quickly and confidently.

With regular speaking practice, useful feedback and repeated exposure to common expressions, the gap between what you understand and what you can say gradually becomes smaller.

At IH Recoleta, our courses place communication at the centre of the learning process, giving students regular opportunities to use the English they are learning and develop greater fluency, confidence and control.