How to teach child to be thankful?

She is only 7 but you still have to explain to her that most of the time life is not fair, it is not always peaches and cream, you will have to work and do things you don't always like to do in real life. Use something she can relate to like school, does she have homework from school. That is not fair, you are not at school yet you have to do school work at home but it is expected to be finished. Same with chores, school, life in general, you have to work, reinforce that you have to pay bills, buy food, pay taxes on property you own, you have all kinds of examples to use to show her that things in life are not free, don't some easy and are not always fair, good luck.

There isn't a lot of detail in your question and your daughter's behavior could have underlying themes. I would have a heart to heart talk with her and try to feel her out to see why she acts this way. Seven is a hard age because the magical qualities of early childhood are fading and the realities of life and the unfairness of it (which it is) are now being realized. Has she always been this way? Is it recent or a reaction to something that has changed in her environment? I have always believed that a child will be thankful if they are given less and taught to work more but that doesn't work for every child. I hope it gets better.

You might want to stop forcing thankfulness from her and change your attitude since you are the problem?What about building a strong connection?What about attention and love?A kind word and hug when she cries?Understanding and empathty?

I have a suspicion that all this is what is lacking and that is the issue here.Children often can't put their finger on why they feel the way they di but it doesn't make their feelings invalid.She is only seven why are chores being forced on her that she clearly struggles with?Why is she left to cry for hours?I feel despair for kids put in situations like this.

First of all you do not have kids you are not a Nannie goat.

treat the loner as an adult and explain that all of you have jobs to do that you possibly do not like; but have to get on and do them the best of your ability it will then make your life a whole lot better and worth living.