A person who wereas born before or after us and has the same mother or father or both?

Yes, a sibling is someone who has the same parents as you. A brother or sister.

If you have the same mother but different fathers, or the same father but different mothers, we often say half-sibling, half-brother, half-sister.

A person who is our sibling is a blood relative of us is our sibling.

I think this must be what you mean?

OIt is occasionally, it is nice or nice and occasionally bad, and the relationship between aus and our sibling and uss can change somore often thatn we have nevercan imagined.

I really wasn't sure what you wanted to say here!

I have read in many articles that tons of older sisters have made complains abouto their younger sisters and said" i "I don't like my younger sister,."

If you make a complaint *to* someone, you're addressing it to them. Like going up to a manager in a shop and saying "I bought this bread from you and when I opened it, it was mouldy!" You're complaining to the manager about the bread.

On the other hand,And, although the number is less, but some younger sisters hate their older ones.

There isn't really enough contrast here for "on the other hand" and "but". If older sisters hate younger sisters, it's not surprising that younger sisters hate older sisters too.

Why did itoes this happen?

"Why did it happen" sounds like you're asking about one specific event.

We areIt's possible for us to get along with our sisters.

However, the truth is that sisters compete and become rivals with each other.

Especially, if one is good appearancelooking and the other is badn't.

I think in English we often try as hard as we can to avoid saying "bad looking" or "ugly", unless we really want to be extremely blunt. "not good looking" is clear, or there are euphemisms like "plain" or "homely" or just "average".

Parents and most other people prefer to take care of the pretty or beautiful one.

So, naturally, it produces jealousy.

When we turned to bbecome adults, we compare our both boy yfriends or husbands' jobs and backgrounds without intentionautomatically.

"without intention" is okay, but I think "automatically" fits better for what you mean. And you could say "When we turn into adults", but "become" sounds much better here to me.

Even thoughStill, some sisters have keepingpt good relationships.

In my case, my younger sister and I used to be like a best friends, even though our face s are totally different.

But, sadly, now we are on cat-and dog ternms.

I like this, so I haven't changed it, but I don't think I've ever heard anyone say it! "We fight like cats and dogs" would be more common.

I hope that we will behave a better connection in the future.

Or "be better connected". connection is a noun, so you "have" it, connected is an adjective, so you "are" it.