It is not needed because the questions could be more concisely put as " Where is she/he?". This redundancy, and the efforts of seventeenth and eighteenth century grammarians to align English with Latin, lead some people to say it is ungrammatical to end with " at ".
Muito difundido é, e pode parecer, que uma query é apenas fazer a requisição de informações, porém podemos lidar com este conceito de forma mais ampla, afinal uma query não serve apenas para consultar dados, mas também para gerenciar o banco de forma geral.
Em linhas gerais, uma Query é o pedido enviado a um determinado banco de dados em troca de informações. Conheça e veja como funciona a query!
The meaning of COULD is —used in auxiliary function in the past, in the past conditional, and as an alternative to can suggesting less force or certainty or as a polite form in the present. How to use could in a sentence.
We use could to ask for permission. Could is more formal and polite than can: Could I ask you a personal question?
We use could to show that something is possible, but not certain: They could come by car. (= Maybe they will come by car.) They could be at home. (= Maybe they are at home.) We use can to make general statements about what is possible: It can be very cold here in winter. (= It is sometimes very cold here in winter.)
Definition of could modal verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.