Question

Fill in the blank with the correct auxiliary verb from the choices given:
How ________ I tell the future? It is always uncertain.
A) Should
B) Is
C) Can
D) Has

Answer 1

Hint:First we must know the uses of all given verbs. Choose the option which will be grammatically correct for the given sentence and also we must see that the selected option will make the sentence meaningful.
In this question we need to look for an appropriate verb which will help to complete the given sentence correctly.

Complete step-by-step answer:
 Let’s first understand what does auxiliary verb means and how we will identify the auxiliary verb.
Auxiliary verb: The verbs be (am, is, was, etc), have and do, when used with ordinary verbs to make tenses, passive forms, question and negative, are called auxiliary verbs. It is also called a helping verb.
Modal verbs are often included in the group of auxiliaries. In some grammar they are called “modal auxiliaries”.
Now let’s examine and understand the option above.
Should: The word ‘should’ is a helping and modal verb which is used before ordinary verbs and express meanings but if we use it here in the above given sentence it will not define the sentence appropriately. So it is inappropriate.
Is: The word ‘is’ is a helping verb but here it is inappropriate for the given sentence above. If we use it, it will not make any sense.
Has: The word ‘has’ is also a verb but it is inappropriate for the given sentence above. If we use it, it will not make any sense.
Can: Here the word can is the correct auxiliary verb as it is making complete sense. So the appropriate answer will be option [C] Can.

Note:Study of parts of speech (a category of words that have similar grammatical properties) and all types of verbs are necessary.