Future perfect in subordnate clauses?
"I will be as old as he is right now by the time that I finish my exams"
"I will be as old as him when I finish my exams"
"I will be as old as him when I will have finished my exams"
"I am as old as him when I will have finished my exams"
Could somebody please clarify those sentences for me? I reckon that only number 1 and 2 are sound, the rest seems to be rather awkward. I wonder if you can use the "future perfect" in subordinate sentences starting with "when", "as soon as" etc.
Thank you very much! 
Top answer
g. a specified event), the verb in the subordinate clause is present tense. The verb in the main clause is future tense.
- g.
- a specified event), the verb in the subordinate clause is present tense.
- The verb in the main clause is future tense.
- When will Annie arrive?
- She will arrive when Fred arrives .
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When when (after, or before) is a subordinator, introducing an expression of a condition in the future (e.g. a specified event), the verb in the subordinate clause is present tense. The verb in the main clause is future tense.
When will Annie arrive?
She will arrive when Fred arrives. They are coming together.
She will arrive after she has finished /finishes was
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