could have when to use?
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These past modal verbs are all used hypothetically, to talk about things that didn't really happen in the past. 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.)
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Both adverbs maybe and perhaps mean the same; they convey uncertainty, a possibility. You can use either when you are not sure, when you want to say “possibly”. However, perhaps is probably a little more formal.
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Remember, if you can possibly add 'now' to a sentence to denote the time of the action you're talking about; you'll use present continuous tense. If you find it easier to add 'for or since' clauses -to denote the duration of time taken for the action you're talking about; you'll use perfect continuous tense.
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The second expression, in hand, has a few meanings or uses. Firstly, if you have something in hand, then you have an extra amount of something, or you have more than you need. We may use this to talk about time, for example, ... You don't need to do anything and it'll all be ready in time.
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The main difference is that the latter is really only answerable with some kind of wall-clock time answer, while the former can be more vague. This makes sense if you think about it. If the question is "What time...?" then the answer would have to include a time, right?
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Nothing would accomplish that. The negative forms of these words (can't, don't, won't, etc.) are also helping verbs. Note: The helping verbs to be, to have, and would are used to indicate tense.
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Yes it can be used. Instance: Requesting you to kindly consider. In this case the request is in continuous form and hence can be used. But only the verb form 'Request' would be harsh and as expressions are an integral part of communication it is better to avoid.
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Helping verbs or auxiliary verbs such as will, shall, may, might, can, could, must, ought to, should, would, used to, need are used in conjunction with main verbs to express shades of time and mood.
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A good trick, that prevents most of accidental misuse of Given-When-Then, is to use past tense for 'Given' clauses, present tense for 'When' and future tense for 'Then'.
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Because have (or the contraction form) sounds like of when spoken quickly, it's common for writers to use the word of instead of have or its contraction. But it's grammatically incorrect to use the could of/would of/should of construction. Never, ever write could of, would of, or should of.
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When you want to talk about possibilities, use could, may and might. They all mean the same thing and we use them all to talk about things that are possibly true now and things that will possibly happen in the future. If you think things are possibly NOT true or NOT certain, say 'might not' or 'may not'.
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When two different ideas or things are linked by and, we use are(plural form). Consider the widely used proverb 'time and tide wait for none' which also uses a plural verb form(i.e wait). Here, both date and time refer to the same idea, that is time. So is is the right option.
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Usage. "As and when" is just another adaptation of "if and when". "If" means it may or may not be needed. "When" means it will be needed. "As and when", often used in statements of requirement, obligation, condition and necessity etc.
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May is used to express possibility or ask permission. Can is used to express ability and informally used to ask permission.
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You may use words like 'especially' or 'because' at the beginning of the sentence as long as you provide a supporting clause after it. Because my dog had fleas, I had to make him sleep outside. Especially when the weather report predicts rain, you should have an umbrella in your car.
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If you say that someone or something has potential for doing a particular thing, you mean that it is possible they may do it. If there is the potential for something, it may happen. The meeting has the potential to be a watershed event.
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Then again, if you write any of your original sentences (without having punctuation fixed) in a chatroom, everyone would still know what you want to say. Until tells us how long a situation continues. If something happens until a particular time, you stop doing it at that time.