В каком случае нужно писать children's, а в каком childrens'? В чем разница, где стоит апостроф и в каких случаях как писать заметить, что слово "children" Я взяла для примера и не знаю может ли там вообще быть апостроф в другом месте. Просто пример.

Правильно пишется только children's, тут притяжательный падеж

Объяснение:

Давай возьмём в пример sister

Sisters - сёстры

Sister's ball - мяч сестры (притяжательный падеж единственного числа)

Sisters' ball - мяч сестёр (притяж. падеж множ.числа)

financial problem in the family is a very difficult and stressful situation in which a man can get.especially if you have a big family, you need in sufficient money.for example   you need in a lot of foods, clothes and others main things.and most importantly you must pay for electricity, water, gas, and all you need around the house and that's why you need money.the worst thing is when many quarrels in the family is due to financial problems and it's also very bad situation.аnd of course the financial problems caused by unemployment.аs we know now is very difficult to find high-paying job.аnd i think that if there were effective methods of dealing with financial problems, then life would be much better and kinder, without any violence, theft and war

вот все что смогла сделать  

bodiam castle (bodiam), located in sussex (england), stands near the river rother (rother), almost on the border of kent and sussex.it belongs to the rare breed of "residential locks," the last true castles in england. preserving the function of the fortress, he, in contrast to the more ancient strongholds, is also suitable for life, and beautifully decorated, showing guests and neighbors, wealth, value and good taste of the owner.when, in 1360 m edward the third signed a peace treaty with bretini in which he renounced claims to the french crown, but retained the aquitaine, calais and other provinces, it is not really thought about the evacuation of the remnants of his troops to england. those people who find themselves in a foreign country under threat of death, rallied. thus were formed the so-called floor units or routiers - private armies officially serve the king, but in fact were selling their services to the highest bidder.