I will have been singingHow do we make the Future Perfect Continuous Tense?The structure of the future perfect continuous tense is:subject+auxiliary verb WILL+auxiliary verb HAVE+auxiliary verb BE+main verbinvariableinvariablepast participlepresent participlewillhavebeenbase + ingFor negative sentences in the future perfect continuous tense, we insert not between will and have. For question sentences, we exchange the subject and will. Look at these example sentences with the future perfect continuous tense: subjectauxiliary verbauxiliary verbauxiliary verbmain verb +Iwill havebeenworkingfor four hours.+Youwill havebeentravellingfor two days.-Shewillnothavebeenusingthe car.-Wewillnothavebeenwaitinglong.?Willyou havebeenplayingfootball??Willthey havebeenwatchingTV?When we use the future perfect...