sometimes i have trouble coming up with topic sentences I dont know where to start and what words to use any help?
Do you not know what to write, or do you not know how to write it?^That should always be the first question you ask yourself for problems like this.
For starters, don't think about the words. Don't worry about making it sound pretty and essay-ish, just get the ideas out as plainly as possible. It can be as clunky as
'This character does a lot of bad stuff in the book, but we still like him.' You'd obviously never want to write something that bad in an essay, but at the very least, you know what you want to express. Focus on the ideas you want to communicate, and then build it up piece by piece rather than all at once.
eg.
'The character does' --> are we talking about acts he perpetrates, or dark thoughts he has, or evil desires he harbors...? What does he 'do,' exactly?
'lots of bad stuff' --> 'Bad' how? Physically repulsive? Morally dubious? Psychologically confronting? Are these things bad for himself, or others? What kind of 'bad' are we talking about? (Looking up words like 'bad' in a thesaurus gives you an idea of just how broad the definition can be)
'but in the end we still like him' --> Do we admire him? Do we sympathise with him? Do we pity him? Do we only like him compared to other, worse characters? Do we like him in spite of his flaws, or because of them?
So after thinking about each of these weak areas ('does,' 'bad stuff' and 'we like him,') we can turn an embarrassingly simple sentence into a sophisticated one:
Character X commits many morally dubious acts throughout the text, however audiences are still inclined to sympathise with him because of his self-awareness and constant feelings of regret.On the surface, it's as simple as that, but admittedly it does take practice and exposure before these words start coming to you naturally. I'm yet to meet a good writer who isn't also a good reader, so try and read widely so things like sentence structures and vocab can be naturally acquired, rather than painstakingly laboured over.