The Function of “Should” as “if”


The Function of “Should” as “if”


“Should” can also be used in conjunction with “if” to express a possible future state that is considered somewhat unlikely to occur. This is in contrast with “were to”, which suggest a future state which is considered highly unlikely or impossible.

Examples:


-          If he should come today, I would greet him heartily.

or

-          Should he come today, I would greet him heartily.

Compare this to the “were to” version:

-          If he were to come today, I would be surprised.

or

-          Were he to come today, I would be surprised.

The difference between the two constructions is a matter of nuance. These sentences could be used interchangeably and not causing confusion. All of these constructions are considered somewhat, formal, particularly in American English. These must also be used in conjunction with “would” to indicate the level of unlikeliness.

For contrast, consider the plain versions, in order of decreasing likeliness:

-          If he comes today, I will great him heartily. (strongly possible)
-          If he came today, I would be surprised. (unlikely, requires “would”)
-          If he had come today, I would have thanked him. (counter-factual, e.g. he did NOT come, requires “would have”

Other examples of “should” that is used as “if”:

-          “Should you feel any trouble understanding the lesson, you may come the me after     class”, said the teacher.
-          Should you feel bored, you can take a look around the neighborhood.
-          You have to stand and defend yourself, should you feel bullied.

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