It can also mean ''you''. Look at this:
''One thing you need to remember is how to correctly use "you" in German. Modern English is the only Indo-European language that has just one form of "you." In German there are three:<pre>
du This form is expressed only with those with whom one is on familiar or intimate terms, such as: family, close friends, children, pets and in prayer. In Germany the word friend isn't used as liberally as in America, or at least it doesn't carry quite the same meaning. Ein(e) Freund(in) is used more to denote what we call here "a close friend", whereas the word ein Bekannter/eine Bekannte is the preferred term used for "casual" friends and acquaintances. ihr Ihr is the plural form of du. For example in: Wo seid ihr?/ Where are you? Sie This polite form implies a certain formality between people and takes into account social considerations. Sie is used for those people we address as Herr, Frau and with other titles (such as your German teacher!) It is also polite to address co-workers as Sie. Sie remains written as Sie whether you are using it in the plural or singular sense. For example, if you are addressing two German teachers, a sentence with Sie could look like this: Werden Sie uns viele Hausaufgaben geben? The same sentence adressed to only one teacher would look like as follows: Werden Sie uns viele Hausaufgaben geben? So, the two sentences are exactly the same.''</pre>
i accidentally put they are man as a typo and they marked it wrong :(
Yes. If a typo results in something that is a real word, Duo can't know whether you meant to use that (wrong) word or whether it was a slip of the finger.
"man" is a word in English -- just not the correct one to use in this sentence. So Duo marks it as a mistake, rather than a typo.
Isnt "sind" used for first and third person?
For first person plural and third person plural, yes -- i.e. for wir "we" and for sie "they".
If so then why is it "sind" and not "seid" if this sentence uses "they"
I think you've answered your own question. "they" is third person plural -- which is why it uses sind.
seid is for second person plural.
Im confused why is sie she and they how do you know which is which?
By looking at the verb.
sie ist = she is
sie sind = they are
For other verbs, the "she" form ends in -t (e.g. sie trinkt, sie isst, sie heißt, sie sagt, ...) while the "they" form ends in -en (e.g. sie trinken, sie essen, sie heißen, sie sagen, ...).
how seid and bist are the same
They are not.
seid is used for ihr -- ihr seid = you are (when speaking to several people at once)
bist is used for du -- du bist = you are (when speaking to one person)
If you can tell the difference between "I am" and "we are" (one person versus several people), you can tell the difference between du bist and ihr seid (one person versus several people).
Nothing to do with masculine or feminine.
wir sind (we are) and sie sind (they are) use the verb form sind.
ihr seid (you are -- speaking to several people) uses the verb form seid.
So you just have to look at the subject -- whether it is wir or ihr or sie.
Plural nouns also take the same verb form as sie "they".
Sie, S is capital here which means they but in sie every thing is small which refer as you
You have it exactly wrong.
The polite "you" is always capitalised: Sie.
The words for "she" and "they" are usually written in lowercase: sie.
At the beginning of a sentence, the first word is always capitalised (as in English). This means that when it is the first word, you cannot tell the difference between sie and Sie any more.