We don't celebrate Halloween, although I do stock up on candy bars for the children of my close neighbors.
Although it was raining, we still went outside to play football.
It was steaming out side although the girl insisted on wearing jeans and two jackets.
Your question is a good sentence using the word "common".
a good sentence is "I cannot use oversimplification in a sentence." that sentence is oversimplification.
Although it was cloudy, he was uncertain that it would rain.
Although it was raining, we still went outside to play football.
Any sentence with although at the beginning is good as any. Although you might want to not use it unless you are giving an example. Remember, just tell me and I'll help. Although you might get bored of me. . . :P The sentences above are true and are doubling as examples too.
Although the nasty brutes ambushed us we got away without a scratch
Although he made a good gag, nobody even smiled.
I bought a cheap pizza, although it did taste good.
Although you do have minor health problems, you are basically in good health.
Yes, it is a fragment, it's not a sentence. It could be a sentence without the word although. "I finished." is a sentence. Using the word "although" needs a sentence that the word is referring to either in front of it or after it. Although I finished, I was not happy with the work. I'm still hungry, although I finished my lunch.
Yes, you can start a sentence with "although." For example: "Although it was raining, we decided to go for a walk."
All of the answers were good, although some information was considered excess.
Although her other works were quite disappointing, her latest opus is supposed to be quite good.
Although this philosophy is not recommended, "Ale is good for whatever might ail you."
They were happy although they were poor.