"You are not a student."

Translation: 你不是学生。

[shlomiabr]

Shēng sounds like shèng here.
Is it so? Can you hear it too? I know bù sounds like bú here, as it should.

[DiamondGirl64]

For certain phrases or words tones can be changed or it could also be the accent/dialect of the speaker

[BenjaminCh29]

You are right. It is pronounced incorrectly

[luynok]

不 before a syllable with 4th tone, like 是, will change from 4th tone to 2nd tone.

[rtk337648]

Probably something to do with sandhi the changing of tones of certain words due to them being next to certain tones

[githikaand]

Wow this works

[Nameless253719]

No, try to remember how 4th tone really sounds, it's a sharp drop, and this particular speaker's accent typically doesn't mangle it. What I hear here is a 1st tone that's not pitched very high, but is flat as it should

[jordanahh]

This sentence is quite easy!

You:你
are not: 不是
a student:學(学)生

[xaviersantana]

You can either be ni or ni men

[ace214547]

Ni men means you-all or y'all.

[llermo6]

Has this app with speaking exercise or can you write in chinese or pinyin?

[yas7115]

So we don't need articles in Chinese??

[JordanDrak702377]

I answered “你不是学玍。” and it was marked incorrect. Am I missing something?

[LydiaA.2413]

No, It looks fine to me. Did you accidentally write Chinese where it said to do English?