"This is Doctor Li."

Translation: 这是李医生。

[e.sol17]

When do you need and not need 个人 and when do you not?

[ArtBeh]

I think 'ge' is equal to indefinite article in English

[LydiaA.2413]

How do you know when to use 这是 and when to use 这个?

[SaraRealien]

个 is a mesure word , so we can't say 这个 for a person , so we say 这是 ，that's what i got from duolingo tips , idk if it's wrong ...

[StankinJankin]

In the tips, it said 个 must be used with 这, right?

[ArynMadden]

Why can't I say 那是...?

[oikawas_ass]

那 means "that".
这 means "this".

[rreestopher]

I think na is that

[AbgMaRah]

I thoughr Dr Li is supposed to be a singular/specific subject. Shouldnt "zhe ge" be more appropriate? Or am i understanding this on the wrong side. Shenmee!!?

[PabloChain]

I dont have i of word Li...so I cant do it well