"Will she come?"
I think it's because the sentence indicates that the topic is female hence why you need to specify the topic in this case.
Nah, it's because 来ます is a transitive verb and needs a subject. In most cases the subject is going to be understood from context but in an environment like this...unless the subject is 'I' we don't know what the subject is
来ます is an intransitive verb. There is nothing that "receives" the action of 'coming.'
See dictionary: http://jisho.org/search/%E6%9D%A5%E3%82%8B
Transitive vs. intransitive has nothing to do with subject anyway, that's about if they can take a direct object or not. You can both use or omit the subject depending on context with both types of verbs.
It's not transitive, in either language, and transitive versus intransitive has to do with taking an object, not a subject. You could not be more wrong, and since this is a learning platform and your comment is so misleading, I felt obliged to correct you.
As to dropping 彼女・かのじょ; you absolutely can, if the context makes it clear we are talking about "her" (some previously mentioned, or obviously implied, female person). Without the context though, and since "she" is specifically mentioned, you should translate it into the Japanese.
While i agree with this conclusion, a lot of these sentences seem to assume context.
Japanese is incredibly context-heavy, and you'll see that even more clearly later on.
Probably because it leaves the meaning way too open for other interpetations. If I heard 来ますか by itself, my first thought would go straight to "will you come". In Duo especially, it seems to favor first or second person over third in ellipses.
why can't I omit ha? Ha gets omitted in speech all the time especially in sentences like this?
why does this line translates into future tense and not in present tense: She comes?
Azraelious, I believe the present and future verb forms are the same in Japanese, so it would depend on context. I am not sure how you would say this in present tense without knowing what the conversation was that included this question. Does she come every week? Is she coming? These 2 examples are present tense to me. Please correct me if I am wrong. Thank you.
That's asking "when will she come?" whereas this sentence is just asking "will she come?".
I'm surprised this discussion hasn't been locked due to inappropriate comments yet...