Breakdown of Ты понимаешь этот текст?
ты
you (singular)
текст
text
этот
this [f: эта, n: это]
понимать
to understand
Questions & Answers about Ты понимаешь этот текст?
Why does the verb end in -ешь?
Понимаешь comes from the infinitive понимать (to understand). Since it is a first conjugation verb (ending in -ать), we form the informal "you" form by dropping the -ть and adding -ешь. This gives us ты понимаешь (you understand).
I see a soft sign (ь) at the end of понимаешь. Does it change the pronunciation?
No, it does not. The soft sign at the end of the -ешь ending is just a strict spelling rule for all second-person singular ("you") verbs. The Russian letter ш is always pronounced hard, so the ь cannot soften it. Just pronounce the end of the word as if the soft sign wasn't there.
Why is the word for "this" этот instead of just это?
Is этот текст in the accusative case here?
Yes, because the text is the direct object receiving the action of your understanding, it is in the accusative case. However, for masculine inanimate objects (things that are not alive, like a text), the accusative form looks exactly the same as the basic dictionary form. That is why the word doesn't change.