The future perfect tense is use for an action, which at some designate future time, will be a past action, the time markers generally used are : By, When, Till, Until, Before.
S + shall/will + have + V3 + O (+)
Shall/will + S + have + V3 + O (?)
S + shall/will not + have + V3 + O (-)
Note : for the future prefect tense “shall” and “will” are used. There are two forms :
- Which just states future time
- Which states future time and expresses a promise, a command or determination.
Example :
- will have done my work before he arrives
- shall have gone before it rains
- The doctor will have written down all the suggested treatments for the patient when you arrive this morning
- Mr. James will have retired by the end of this year
- He won’t have returned from England until he finishes his studies
Reading
Mr. Ontoseno had a server heart attack. His wife and two children are going to take him to a cardiologist. It will take them about an hour to reach the doctor’s clinic. It is one o’clock now and Mr. Ontoseno and his family are at the hospital. At this time tomorrow, Mr. Ontoseno will be lying in bed at the coronary care unit. Perhaps he will be sleeping soundly because by then he will have been given sedative in order to provide him with enough sleep. The nurses will have given him morphine sulphate to reduce pain.
By Friday next week he will have regained his strength. If the symptoms do not recur, he will come in about two weeks. He can go back to work. Of course, he should not work too hard.
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