Yes. It is quite natural to call your pet he or she

It means a stream of water that makes a nice and relaxing sound. sometimes you may hear people use the phrase to describe someone's way of laughing or talking

Another example of that sort could be: Were I to be given a class in which to teach whatever I wanted, I would choose to teach a language. OR Were I to pick a writer with whom to spend a day, I would pick Milan Kondra. OR Were I to be given an eraser by which to erase a part of world's history, I would erase the world wars. Explanation: The point is that whenever in a sentence we need to use one of the connectors like WHICH or WHOM, and a preposition like IN, AT, BY, FROM, ETC, the preposition goes before the connector. Another point which relates directly to your question is that sometimes after phases like IN WHICH, AT WHICH, FROM WHOM, ETC we immediately have a complete independent sentence and sometimes we have an dependent clause containing an infinitive (TO + VERB). your case is the latter. Check also these examples: She is the teacher from whom I learnt a lot. OR It is the neighborhood in which I spent most of my teenage years. Hope that was useful.

Yes you can. Subject + Could + have + p.p shows a possibility in past which could affect the present.

Hi. This is an almost exact but not poetically professional translation of the poem. hope it helps. I asked: When will your lips give me the joy? She said: They will sure do as you say I said: but they demand a price so high I cant pay She said: No one loses in such an affair I asked: Who could find the path to your lips? She said: This is to be told to the ones who know! I said: Leave worshiping the idols, worship the god! She said: In the world of love both shall be done I said: to breathe in the alehouse washed the pain She said: blessed are those you make that happen I said: Wine and the worship? not the way of faith! She said: In the faith of the old vintner both can happen I asked: What would the old gain kissing such lips? She said: They'll rejuvenate them by a sweet kiss I asked: When can the man enjoy his sweetheart? She said: The time the Jupiter and the moon get also close