"What DO I have to do?" "What have I to do" <- sounds very poetic... "When DO we go?" "DO I have to do something about it?" Remember to use either DO or DOES I DO YOU DO HE DOES SHE DOES WE DO THEY DO So: Do you like this song? Do they have to do their homework? Does he enjoy school? Do they read and write well? Do they have any homework to do? However, sometimes you will hear: "You do like this song, (right)?" "You have to do your homework, (right)?" This is usually used when you are trying to confirm something. You can add "right" to the end of the sentence. I hope this answers your question.

Yes. You do have to invert the verb and pronoun when you ask questions in English. In many languages, Portuguese included, it is enough to change the intonation or add a question mark to change a statement into a question. This is not the case with English. There are strict rules for interrogative word order, and you have to stick to them. If your sentence has a modal verb (e.g. can, will, should) or an auxiliary verb (e.g. is, was, have), you do a simple inversion: Can I come in? Will you do this? Are you working? Have they eaten? In the case of simple tenses, you need to use the auxiliary 'do' or 'does' in the present, and 'did' in the past, followed by the base form of the main verb. For example: He speaks French -----> Does he speak French? She went to the party yesterday -----> Did she go to the party yesterday? So the correct question forms of your sample sentences are as follows: What do we have to do? When do we go? Do I have to do something about it? I suggest you look up 'Question forms' in a grammar book or language website, study it a little and do a few exercises to practise. Feel free to ask if you have any more questions.

Spoken English and written English are sometimes different. What people are trying to say is that "I have many things to do." but people often say, "I have to do many things" 'have to do' is NOT correct / 'must do' is correct "I have many things to do." / "I must do many things." 1. What 'I have' to do? x What 'have I' to do? What I must do / What have I to do? I must go to the store. / What have I to do when I get to the store? I must buy milk, fruit, and eggs. When 'we go'? x When 'go we'? we go is correct. As a native English speaker, I never use 'go we'. 'I have' to do somthing about it? x 'Have I' to do something about it? I must do something about it. Have I many things to do about it?