"We are all teachers."
It would be so helpful if one could actually know what these characters mean. Just hearing the random sound after a few days away is no help to my learning, since I've forgotten any meaning I learnt. So frustrating to have no way to look up meanings. And reporting is just checking a box to say the hover isn't working, which isn't accurate as there is no hover in my exercises.
You can click them during the reverse translation (in the problem statement) to view individual meanings
in Chinese grammar, adverbs always come before the verb phrase and always after the subject. ex. subject + adverb + verb phrase + object: 我们都喜欢吃中餐。(We + all + like to eat + Chinese meal).
I think duolingo is taking more of an approach of allowing you to pick up grammar without fully understanding it. The way a toddler would. You don't explain to a toddler how grammar works and why words have to appear in particular orders. :-)
There is actually a decent amount of research that shows this method of teaching to be effective. But i really like the way you explained it.
On a communication level, "we" isn't necessarily all inclusive. A co-worker can tell the boss "we appreciate you" but does that mean each and every co-worker? To emphasize, 都(all) is inserted. Grammatically, 都 must be present when the verb is done by a plural entity. "We" can be a singular group or a group of many persons, just depends on the situation.
It helps me to use Pleco dictionary parallel to Duolingo. It also allows to create flashcards for the words we learn. Give it a try. I am on Android. Don't know about other platforms.
The 人 symbol is used after a country name to say the nationality. Kind of like -ian, -ish or -ese endings in English (Canada, Canadian, Britain, British, Portugal, Portuguese). China = 中国 Chinese = 中国人
My chinese teacher told me it means "people" so of a whole which would make since of why ifs chinese instead of china. For example zhongguo =china Zhongguo ren= chinese person or chinese people
Teachers are people. It is understood that all work occupations must be done by people, so 人 would be redundant. However, countries are not people. Thus, America+an = American. Just like 美国人 = 美国 + 人. ...... 我为你加油!