Questions & Answers about Eu sei disso.
What does "Eu sei disso." mean in English?
It translates as "I know that" or "I know about that." The sentence indicates that the speaker is aware of or has knowledge of something that has already been mentioned or is understood from context.
How is the word disso formed and what does it mean?
Disso is a contraction of the preposition de (meaning "of" or "about") and the demonstrative pronoun isso (meaning "that"). Together, disso literally means "of that" and refers back to something previously stated or implied.
Why do we use the contraction disso instead of saying de isso?
In Portuguese, it is grammatically correct—and more natural—to contract certain combinations. When de precedes isso, they merge to form disso. This contraction is a standard aspect of Portuguese grammar and helps maintain a fluid, efficient style of expression.
What is the grammatical role of the verb sei in this sentence?
Sei is the first-person singular form of the verb saber in the present tense, meaning "I know." It clearly indicates that the speaker (indicated by eu) currently has the knowledge being discussed.
Is it necessary to include the subject pronoun eu in this sentence?
No, it isn’t strictly necessary. In Portuguese, the verb form sei already indicates that the subject is "I." However, using eu can add emphasis or clarity, especially for beginners or in contexts where the subject might otherwise be ambiguous.
How does the sentence structure in "Eu sei disso." compare to English?
Both Portuguese and English use a subject-verb-object (or complement) structure. In English, you might say "I know that," whereas Portuguese requires the contraction disso to smoothly connect the verb saber with the information being referenced. This difference is due to specific prepositional contractions common in Portuguese.
More from this lesson
AI Language TutorTry it ↗
“What's the best way to learn Portuguese grammar?”
Portuguese grammar becomes intuitive with practice. Focus on understanding the core patterns first — how sentences are structured, how verbs change form, and how words relate to each other. Our course breaks these concepts into small lessons so you can build understanding step by step.
Sign up free — start using our AI language tutor
Start learning PortugueseMaster Portuguese — from Eu sei disso to fluency
All course content and exercises are completely free — no paywalls, no trial periods.
- ✓ Infinitely deep — unlimited vocabulary and grammar
- ✓ Fast-paced — build complex sentences from the start
- ✓ Unforgettable — efficient spaced repetition system
- ✓ AI tutor to answer your grammar questions