Future perfect or future perfect continuous 1. he will have built / will have been building the house by next summer/ 2. she will have typed / will have been typing the documents for two hours by 4 o`clock. 3/ she will have typed / will have been typing all the documents by the end of the working day. 4. they will have climbed / will have been climbing everest for a week by next wednesday 5. they will have climbed / will have been climbing everest by next sunday.