The Future Perfect and the Future Perfect Continuous

In the future, these often start with by or in. By 20 20, the city's population will have doubled. In june, i'll have been unemployed for five months. The time phrases begin with in or on. We can also use the future perfect and future perfect continuous to say what we imagine might or might not have happened. They won't have arrived yet. They only left 20 minutes ago. Sam didn't come home last night. He'll have been working all night to finish his report. On sunday, he'll have been travelling for three weeks. When your train gets in, we'll have been waiting for over two hours. By the time you get home,