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  2. @amot_fy_halmntd

    CAN & COULD:
    In the one instance, 'can' speaks of the present tense, while 'could' talks of the past tense.

    "He can ride a bike."

    "He could ride a bike, but then he broke his legs."


    In your examples, the word 'can' is talking about ability. "Can you do me a favor" is literally asking "Do you have the ability to do me a favor?" Most of the time, the answer to a "can" question should be yes, except occassionally under extenuating circumstances.

    For example, "Can you loan me 50 dollars?" Technically, the answer is yes, as long as the person has at least 50 dollars. Whether the money is actually loaned or not, is another story altogether.


    "Could" refers to desire. "Could you loan me 50 dollars?" is completely different than "Can you loan me 50 dollars?" It's asking whether the person is willing, not if they are physically able.

    One more example: "Can you do all of my housework for the next three years?"

    The answer is technically yes, because the person being asked has the physical ability.

    "Could you do all of my housework..."

    The answer is no. This request is obviously not practical or acceptable.

  3. @amot_fy_halmntd

    SHOULD :
    • We use should and shouldn't to give advice or to talk about what we think is right or wrong.
    • You should means something like I think it is a good idea for you to do it.
    • You shouldn't means something like I think it is a bad idea for you to do it.
    • Should is used to express the opinion of a speaker and often follows I think or I don't think.
    Examples
    You look tired. I think you should take a few days off.

    Alice works very long hours. She should to talk to her boss.

    - I have an English test tomorrow.
    - I shouldn't worry if I were you. You have worked really hard.

    - I never have enough money.
    - I don't think you should go out so much.

  4. @amot_fy_halmntd

    Have To and Don't Have To - Use :

    · We use have to to talk about strong obligation that comes from somewhere else, for example from you boss, you parents, a rule at school or work.
    Examples:

    I have to be home by ten. (My parents told me so.)
    I must be home by ten. I have a very difficult day tomorrow. (It is my own decision.)

    I have to get up early, because I start work at 8. (It is a rule.)
    I should get up early. (Now I stay in bed until lunchtime.)
    · Don't have to means that there isn't any obligation at all,
    there is no need to do it.
    Don't have to is different from shouldn't and mustn't.
    Examples:

    I don't have to get up early at weekend.
    (I can stay in bed as long as I want.)

    You mustn't tell lies. (It is very bad to tell lies.)

    You don't have to go with me.
    (You can go with me if you want to.)

    You shouldn't smoke. (It is bad for your health.)

  5. @amot_fy_halmntd

    We use there is and there are when we want to say that something exists (or does not exist
    There's a centipede under this stone.
    There are two good reasons to do this.
    There isn't any flour in the pantry.
    There aren't any seats available.
    Is there any petrol in the car?
    Are there any potatoes?

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