He stayed a week, he stayed a week, he stayed a week. He stayed a week.
- He stayed a week vs He stayed for week I
- consider her my friend vs I consider her as my friend to a couple. What is her weight for being my friend?
- I don’t know whether he can be there vs I don’t know how he can be there
I often hear the above sentences and their variants.
Which one is the baseline for choice?
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In the first two sets, both options are totally acceptable.
In the third set, both options could easily be interchangeable but there is a general rule that seems wise to consider:
Condition vs Alternative :
Condition
In many cases, if and whether can be used interchangeably without affecting the meaning. What are the subtle differences in formal use. Get the basic of each one! Use if to indicate one condition that requires action. If X is true, then do Y.
I don’t know if he can be there
Alternative :
Use whether to indicate two conditions, alternates, that require an action : yes or no, X or Y. If X or Y is true, then do Z.
I don’t know whether he can be there (or not).
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He stayed a week
vs
He stayed for a week
I would say that just’a week’ would be more casual, and something you would speak, whereas’for a week’is more formal (and grammatically correct) & would prbably be written. However here I would say that the diference is more or less negligible.
I consider her a friend,
I
consider her a friend.
I would use the phrase ‘I consider her my friend’.
I consider her as my friend. This sounds odd to me. I wouldn’t use that. In one instance I might use the latter could be in the case of emphasis or speaking the sentense slow or angrily.
I don’t know whether he can be called
and
I don’t know whether he can be called
a messenger or not. They are identical (in terms of interchangeability and naturalness) and I hate
them both.