Meaning → video example → shadowing

Hear the word you searched for in a real video.

Check the meaning, hear the sentence, then say it yourself.

Try the first 30 sentences of each lesson free, without signing up

English word

sum

B2Academic AWL-4Frequent NGSL-2

UK /sʌm/US /sʌm/

noun

an amount of money

verb

1. Hear it in context

Play the full sentence where this word appears.

2. Say the same sentence

Shadow it and continue learning in the lesson.

Real video examples

See where your sentence appears

Sentence 208 · Pro

Elon Musk: A future worth getting excited about (TED 2022)

This sentence is beyond the 30 free sentences

Learn this sentence with Pro →Try the first 30 sentences of this lesson

The free preview is not the sentence containing your word.

Which, if you sum up those mistakes, will sound like I'm the worst predictor ever.

Elon Musk: A future worth getting excited about (TED 2022)

From one sentence to the full lesson

Bilingual subtitles · repeat a sentence · shadowing · word bank

Tap a word in the lesson, then save it to your word bank.

Open the lesson →

Print the lesson as a PDF

Preview and print the first 10 sentences free. The full handout requires Pro.

Preview printable lesson →

Remember sum through real videos

LingoTube turns TED / YouTube videos into sentence-by-sentence bilingual lessons: synced subtitles, tap any word for meaning and pronunciation, save to your word bank with spaced repetition.

Try the first 30 sentences of this lesson

The free preview is not the sentence containing your word.

Learn with famous talks

Steve Jobs' Stanford Address

Apple · Watch now

Sir Ken Robinson TED

TED · Watch now

Tim Urban TED

TED · Watch now