'đang' is used in all continuous tenses VD: tôi đang làm bài tập về nhà (I'm doing my homework at the moment) 9 giờ tối qua tôi đang xem TV (I was watching TV at 9 pm yesterday) _đang also expresses your present feeling: tôi đang buồn tôi đang đói

Unlike "to be" (is, are, been ...) in English which are used to describe both action and feature of things, such as, "I'm swimming" or "I'm tall", we use different words. And "đang" is used for present continuous tense, namely, you ARE doing something. To describe a feature, you don't need any supportive words. Just "tôi cao" - I tall, literally. And the second part. I think you mean "đứa con gái" - "a/ the girl". "đứa" is literally translated to a kid. You can use it independently, for example "đứa này béo" - the kid is fat. Also you can use it as an article before "con gái" - girl or "con trai".

"đang" is meaning A action is hapening. ortherwise, "đưa", in vietnamese it have meaning "chuyển cái gì đó cho ai đó" or take sth to some one or take some one to some one .

Tôi đang bơi - present continuous tense, you are doing something. Tôi đang cao - meaning is Tôi đang lớn lên - you grow up day by day Tôi cao - present tense, it is the fact Đứa - is used to count when noun is only person

Hi David. I'm a Vietnamese. I can help u if u want. Contact me anytime