will have gone/will be gone

[GUEST2008]

Hi

By that time tomorrow, I'll have gone.

--- Is it also possible to say: "I'll be gone". I thought that we have to use this tense especially if we use the word "for", for example: By that time tomorrow, I'll have been gone for two hours".
How about: By that time tomorrow, I won't be here.
Thanks

 

[MrPedantic]

Hello G.,

1. By that time tomorrow, I'll have gone.
2. By that time tomorrow, I'll be gone.
3. By that time tomorrow, I'll have been gone for two hours.
4. By that time tomorrow, I won't be here.

All these examples are fine.

#1 predictively looks back at a future action ("going") from a point even further in the future ("that time tomorrow").

#2 looks towards a future state (being "gone") at a particular time ("that time tomorrow").

#3 is as #1, but specifies the period between the two future points.

#4 is as #2, but presents a negative equivalent ("not being here", as opposed to "being gone").

Best wishes,

MrP

 

[sarat_106]

Hi

By that time tomorrow, I'll have gone.

--- Is it also possible to say: "I'll be gone". I thought that we have to use this tense especially if we use the word "for", for example: By that time tomorrow, I'll have been gone for two hours".
How about: By that time tomorrow, I won't be here.
Thanks

You can use all depending on the context. They are either in future simple or perfect tenses and in active or passive form, as indicated below.
1. By that time tomorrow, I'll have gone. (future perfect in active voice, expressing the idea that something will happen e.g. to your movement, before a specific time tomorrow.
2. By that time tomorrow, I'll have been gone for two hours.(future perfect in passive voice, expressing that something is going to occur for two hours before a specific time tomorrow)
3. By that time tomorrow, I'll be gone. (Simple future in passive voice)

4. By that time tomorrow, I won't be here. ( a negative sentences expressing future possibility with modal verb ‘would)

 

[MrPedantic]

in active or passive form

1. John will be | gone by this time tomorrow.

I wouldn't myself call this a passive form; that would imply an agent, who had inflicted an action of "going" on John.

Cf.

2. John will be | dead by this time tomorrow.

Like "dead" in #2, "gone" in #1 is an adjective; though of a participial kind.

This however is a passive form:

3. Carthage will have been utterly destroyed, by this time tomorrow.

(We can add an agent clause, e.g. "by the Romans"; therefore it is passive.)

Best wishes,

MrP