As you studied, the prepositions For and Since, when used with Present Perfect Simple, express time. Read the sentences and complete them correctly...

Com certeza! As preposições "for" e "since" são usadas para expressar tempo no Present Perfect Simple. - "For" é usado para indicar uma duração de tempo. Exemplo: "I have been studying English for 3 years." (Eu tenho estudado inglês por 3 anos). - "Since" é usado para indicar um ponto específico no tempo. Exemplo: "I have been studying English since 2018." (Eu tenho estudado inglês desde 2018). Para completar as frases, você precisa usar a preposição correta de acordo com o contexto. Por exemplo: - I have been living in Brazil _____ 2010. (since) - She has been working on this project _____ two weeks. (for) - They have been married _____ 10 years. (for) - He has been playing guitar _____ he was a child. (since) - We have been waiting for the bus _____ 30 minutes. (for)