Technically, could is the past tense of can, but it is an auxiliary verb with a few uses, not all of which are in the past tense, namely the following:
I should think that a healthy forest program is essential to any presidential victory.= I think that a healthy forest program is essential to any presidential victory. To politely express a request or direct statement:.
Think of should as ought to or probably will. With an early start, they should be here by noon. = If you wish to do so, you may have hot tea and biscuits. Should you wish to do so, you may have hot tea and biscuits. Think of should as do furthermore, should could be left out of the above sentence, leaving, " If I find your coat, I will be sure to call you." Alternately, if could be left out of the sentence: " Should I find your coat, I will be sure to call you." If I should find your coat, I will be sure to call you. Think of should as supposed to, as in the previous example, but here to make a persuasive statement. You should floss and brush your teeth after every meal. Here, should means about the same thing as ought. Should I turn in my assignment now? = Am I supposed to turn in my assignment now? Should you have erased the disk? = Were you supposed to have erased it? Technically, should is the past tense of shall, but it is an auxiliary verb with a few uses, not all of which are in the past tense, namely, the following: = If circumstances had been different, is it possible that you might have changed your mind? Strange but true: Notice how changing have to had can change the way would works:.The second sentence predicts that, at that future time, dinner will be ready for him. The "calculating" (or believing) happened in the past, yet the arrival is going to occur later. The first sentence means he believed his camp arrival time was going to be about 6:00 p.m. He calculated that he would get to the camp around 6 p.m. To show future likelihoods relative to past action:.This means my choice is to delay taking the test, but I do not have the ability to delay taking it. Implied is that I would rather die than.do whatever it is that the context has provided as an alternative to dying. However, the second choice may by implied but not stated: = I prefer handwriting instead in typing. = I prefer death in place of facing them. To show preference between two choices, used with rather or sooner:.(The plane was in the air and then back on the ground several times.) Helen would sob whenever John would leave home.įor a moment the plane would be airborne, then it would bump back down along the hard earth. Think of should as if, and would as will. Should I win a million dollars, I would fix up my house. To explain an outcome to a hypothetical situation:.Here would has a similar meaning to do but less emphatic. I would have to say that you're acting a bit immature. To tone down strong, controversial statements-not recommended in formal essays:.If her response had been to not wait, then next John would have been on the wrong trail.) John would've missed the trail if Mary hadn't waited for him at the stream. This "not knowing" occurred before my not helping you.)
I would have helped you if I had known you were stranded. To show a different response if the past had been different:.In the two sentences above, would means about the same thing as will. Would you turn in your assignment now? = Please turn in your assignment now. Would you like some coleslaw? = Do you want some coleslaw? Technically, would is the past tense of will, but it is an auxiliary verb that has many uses, some of which even express the present tense.
Would, should and could are three auxiliary verbs that can be defined as past tenses of will, shall, and can however, you may learn more from seeing sentences using these auxiliaries than from definitions.
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