Do you know how to use 二 and 两？😂
二 (èr) Is for Numbers
The digit "2" is 二 (èr). This is used generally in numbers, when counting to ten, giving out a phone number, and so on.
Unlike 两 (liǎng), 二 (èr) is not used to say there are "two" of something and does not generally occur with measure words by itself. Numbers like 十二 (12) (shí'èr) and 二十二 (22) (èrshí-èr) end with a "2" and can still be combined with measure words. In those cases, 两 (liǎng) is not needed.
两 (liǎng) Is for Measure Words
When specifying quantities (and using measure words to do it), 两 (liǎng) is used. This is when you want to say "two of something" or "both."
by Nora Ou