Yes. As long as the sentence is indeed a sentence (a subject and a verb) and not a fragment, then there is no reason why "both" cannot start a sentence.
For example, there is nothing gramatically incorrect with the sentence: Both Amy and I waited in the rain for hours before the bus finally showed up.
yes you can if you are writing informally
I'll write your sentence, but only for your own edification.
Use it in a sentence.
Complex (APEX)
This math problem is herculean, only geniuses can solve it.
Bob, you can eat that pear only if there is a pair of them for me and you.
I went to the beach once last summer with my family.
I'll write your sentence, but only for your own edification.
"You only use it in programming".Thank you for your incorrect input!
Only in the sentence,' I is the ninth letter of the alphabet'.
Only Batman knows
Use it in a sentence.
Propaganda is not only dishonest but also inflammatory.
Only use the word you when you are having a conversation with someone you are talking about!
No, they can only use swords,daggers and staffs
"Scientists believe that Neanderthals coexisted with early humans in Europe."
Well, unacceptable means not acceptable, so you can use it in the sentence,"You only finished half of your homework; this is unacceptable."
"Heard" is the past tense of the verb "hear" and is used to describe receiving auditory information through your ears. In a sentence, you can say "I heard a beautiful melody playing from the piano next door," to describe that you perceived the sound with your ears. On the other hand, "why" is used to ask for the reason or cause of something. For example, in the sentence, "Why did you leave the party early?" the word "why" is seeking an explanation for the action of leaving early.