We can stay with Jessica in London (we will be able to stay)ĬOULD expresses the theoretical possibility of something happening.We also use CAN to indicate that there is a very real possibility of a future event happening. It can be expensive to keep a dog (it can be and sometimes is).I might not be back in time for supper, so don't wait for me.ĬAN is used to say that something is possible and actually happens.MIGHT, like may, expresses possibility, but is more tentative and slightly less certain. A - "Where's Sandra?" B - "I don't know.MAY expresses the possibility that something will happen or is already happening. If the flight was on time, he should have arrived in Jakarta early this morning.Expectation means believing that things are or will be as we want them to be.This use of SHOULD carries the meaning of " if everything goes according to the plan, then something should happen" therefore it doesn't suggest negative or unpleasant ideas. SHOULD expresses what may reasonably be expected to happen. She can't have a ten-year old daughter! She's only twenty-five herself!.He walked across the Sahara desert! You must be joking!.As we do not have all the facts, it is less certain than will. MUST is used to assert what we infer or conclude to be the most logical or rational interpretation of a situation or event.
They indicate an assumption based on our knowledge of people and things, their routine, character and qualities. WILL and WON'T are also used to express what we believe or guess to be true about the present. His latest book will be out next month.The truth or certainty of what is asserted is more or less taken for granted. WILL and WON'T are used to predict a future event or action which are seen as certain. Modal Verbs expressing certainty, probability or possibility But they can also express ideas such as willingness and ability, permission and refusal, obiligation and prohibition, suggestion, necessity, promise and intention. All of them (except for NEED) can express degress of certainty, probability or possibility of an event.
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