The reasoning of the future tense
LarryLatham wrote:It is not a matter of language. It is an experience of life.
Do you believe many grammars for young students agree that we have future tense? Do you need me to quote some examples from the web, so that you may believe? I really don't think so. But if they regard there is future tense, do you think they don't know what you have put here -- an experience of life? What I mean is, people can experience the same thing but have a different viewpoint, so we had better throw in some logic to back up the experience. But I missed the logic in your message. Timidly, I post my reasoning below and hope you may give a comment on it.
You explained the future and wrote:The future is separated from the present, of course, by a period of time, just as everyone knows.
Not very precise. But we may go on based on this agreement.
Now, we may review your example:
Ex: "They've already been gone for two hours. Surely they will be home by now."
What if later we found out they were
now not home yet, because they went to see a movie and dine out before going home? Then what kind of action it is when you say "Surely they will be home by
now"? It is neither past nor present action. Indeed, it is not an action at all: "They are not home by now." Now the action "Surely they will be home by
now" is realized after you say it. Since the realization of it is
separated from the present, what is the matter if we call it a future action? It is totally in accordance with your definition, and according to our experience of life. And then, what is wrong if we claim the future action is in future tense, for every action contains a tense?
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LarryLatham wrote:We also can use present tense verbs along with future time adverbials... expressions such as "tomorrow", or "next year".
Our logic goes on. Furthermore, as for your example above, why didn't you say in Simple Present "Surely they ARE home by
now"? It is because you are not so sure. The realization of it depends on the future -- a description of a future action. On the other hand, if we are sure it happens, we may use Simple Present with future time adverbials...such as "
tomorrow", or "
next week". It is aware and agreed by most grammars. My humble further logic is, for example, if something important happens now and you need to meet your boss tomorrow and he has agreed, the meeting has actually started by Now. It is a present action, rather than a future one. I have an example of marriage around here in the forum. If John marries June next weekend, the marriage will not just start on next weekend. It has actually started by now. Then the marriage is actually a present action, rather than a future one. The further proof is, some years later, if people ask John and June to talk about
the marriage, they may start by the day John asked June to be his wife, rather than by only
the day of marriage. Nobody will object this. It means that the marriage is not merely started by the day of the marriage. It is our experience of life.
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Put it simply, if we are sure the action happens, we use Simple Present, even with future time adverbials like Tomorrow or Next Year. A correspondent told me that one can say "I see my doctor four years later", if the appointment is agreed. On the other hand, if we are not so sure it happens, we use modal auxiliaries to help indicate the possibility -- even with time adverbial 'Now'. Since actions with modal auxiliaries are realized in a time separated from the present, they are future actions, in future tense.