English grammar help: how to use 'should', 'would' and 'could' 'Should', 'would' and 'could' are auxiliary verbs that can sometimes get confusing. They are the past tense of 'shall', 'will' and 'can' but are also used in other situations..
Thereof, when we use could and would?
Could, would, and should are all used to talk about possible events or situations, but each one tells us something different. Could is used to say that an action or event is possible. Would is used to talk about a possible or imagined situation, and is often used when that possible situation is not going to happen.
when we use could and can? Can, like could and would, is used to ask a polite question, but can is only used to ask permission to do or say something ("Can I borrow your car?" "Can I get you something to drink?"). Could is the past tense of can, but it also has uses apart from that--and that is where the confusion lies.
Also question is, what is the difference between could and would?
Key Differences Between Could and Would Could is the past tense form of the verb 'can' which indicates a past ability of someone or possibility of an action or happening. Could is used when the situation is possible in the past. On the other hand, would is used when the situation is unreal or unlikely to happen.
Can I vs May I?
The only difference between the two verbs is that one is more polite than the other. In informal contexts it's perfectly acceptable to use can; in formal situations it would be better to use may. Back to Usage.
Related Question Answers
Can you please or could you?
If taken literally, "Can you" is equivalent to asking the person if they're capable of doing something. "Could you", on the other hand, implies that the action can be completed under some circumstances by the person. The usage of can you is idiomatic, and hence, is more popular used phrase of the two.Would Will could can?
Could is generally used as a past form of can. Would is the past form of will, and in this context it's used in the participle form, e.g.: I would have gone by the time you'll arrive here. Would can replace 'can' but it's not that strong in nature and is informal.Would use in spoken English?
Would is an auxiliary verb - a modal auxiliary verb. We use would mainly to: talk about the past. talk about the future in the past.Where would is used?
Would is a past-tense form of will. If you are writing about past events, you can use it to indicate something that was in the future at that point in time, but is not necessarily in the future right now. In other words, you use would to preserve the future aspect when talking about the past.When we use can?
"Can" is one of the most commonly used modal verbs in English. It can be used to express ability or opportunity, to request or offer permission, and to show possibility or impossibility. Examples: I can ride a horse.What is the difference between can and will?
Will and Can are two auxiliary verbs that are often confused when it comes to their usage. On the other hand, the verb 'can' is used in the sense of 'ability'. In other words, the verb 'can' indicates 'ability', but it does not indicate future tense as 'will' does. This is the main difference between the two words.Where do we use could?
"Could" is a modal verb used to express possibility or past ability as well as to make suggestions and requests. "Could" is also commonly used in conditional sentences as the conditional form of "can." Examples: Extreme rain could cause the river to flood the city.What is the difference between could not and could not?
“Will” implies that the task will actually be completed (whether or not by choice). Similarly, “Could” only implies that the task was existentially possible to complete. “Would” implies that some particular condition enabled or hindered the task from completion.Could have meaning?
1: Could have + past participle means that something was possible in the past, or you had the ability to do something in the past, but that you didn't do it. (See also modals of ability.)Would instead of Will?
Most of the times, the source of the confusion is the perception that “would” is always used as the past form of the auxiliary verb “will”. Yes, “would” is the past form of “will”, but it has various other uses too, which have nothing to do with the fact that would is the past form of “will”.Is an an auxiliary verb?
An auxiliary verb helps the main (full) verb and is also called a "helping verb." With auxiliary verbs, you can write sentences in different tenses, moods, or voices. Auxiliary verbs are: be, do, have, will, shall, would, should, can, could, may, might, must, ought, etc. I think I should study harder to master English.Could meaning and use?
Use could in a sentence. verb. The definition of could is often used in the place of "can" to show a little doubt. An example of could is someone asking if they can help someone. An example of could is saying that something is able to happen if someone does something.Could you and would you difference?
The most proper way to use these words is to use "could" if you're not sure if the person is able to do something. If you know the person is capable of doing what is asked, then it's better to use "would".What is the meaning of would have?
Answer: "Would have" is used together with a main verb. When you see "would have" in a sentence it means that the action didn't actually happen, because something else didn't happen first. Here are some examples (the main verb is bold): - If I had received the money, I would have given it to you.Can past tense?
Could is used as the past tense of "can".Will and would use?
Will and would are verbs, and each can be used many different ways. Will can be a present tense verb that means to cause something to happen through force of desire. Would is a past tense form of will. It is also a conditional verb that indicates an action that would happen under certain conditions.What is the future tense of could?
The use of 'could', 'would', or 'will be' all imply future tense. The past tense version would be: "Can" may be used either as future or present tense, but using "is" or "am" almost always implies present tense.Can in the future tense?
There is no future tense of can or any of the other invariant modals. There is no future tense of can or any of the other invariant modals. Sometimes could is said to be the conditional of can, and would of will, though.Can and can't usage?
Here is a quick summary: Can't is a contraction of cannot, and it's best suited for informal writing. In formal writing and where contractions are frowned upon, use cannot. It is possible to write can not, but you generally find it only as part of some other construction, such as “not only . . . but also.” 
