Traditionally it shouldn't be used to begin a sentence.
However, this grammatical rule is often broken by writers for style reasons.
When writing for academic papers etc it's a good idea to not begin sentences with but. However, if you're writing a novel then it's more widely acceptable.
Usually at the beginning, for example: Contrary to popular belief, the word contrary is used at the beginning of the sentence in which it is used.
Basically, any word can be used in the beginning of a sentence.
pH is term used in chemistry.
Capitalization
It is possible to have a sentence with the word it at the beginning, as this sentence proves.
Adverbs can be used at the beginning, middle, or the end of a sentence.
Yes, all words used in the beginning of the sentence is capitalized.
Usually at the beginning, for example: Contrary to popular belief, the word contrary is used at the beginning of the sentence in which it is used.
No, "ecology" is not capitalized when used in a sentence unless it is at the beginning of a sentence or part of a title.
It's actually notwithstanding, (and not notwothstanding). Anyway, yes, you can use it at the beginning of a sentence.
Basically, any word can be used in the beginning of a sentence.
Actually, yes it can.
No, "personnel" is not capitalized when used in a sentence unless it is at the beginning of the sentence or part of a title.
No, "EG" should not be used at the beginning of a sentence as it is typically used in the middle or end of a sentence to introduce an example. If you need to use it in the beginning of a sentence, consider rephrasing the sentence to improve flow and clarity.
Yes, if "I" is used as a pronoun at the beginning of a sentence, it should always be capitalized.
The adverb "often" can be used at the beginning of a sentence to indicate frequency or regularity of an action or event. For example, "Often, I go for a run in the morning."
No, "ACE wrapping" is not typically capitalized when used in a sentence unless it is at the beginning of a sentence or part of a title.