Частица to как я знаю ставится перед глаголами в неопределенной форме. но есть предложения в которых глагола вроде и нет, но to все равно ставится, вот пример the answer to my question ответ на мой вопрос почему она ставится тут?

Здесь to - это не частица, а предлог "ответ на вопрос."

Вданном предложении "to" не частица.

№1. 1) she's 2) they're 3) she wasn't 4) i'm 5) it isn't 6) you won't 7) he won't be 8) they weren't №2 1. the weather is nice today. 2. my name is mary. 3. i am from the usa. 4. bill and terry are students. 5. my friend is a student too. 6. we are friends. 7. this is my flat. 8. these men are their friends. №3 1. my son is a student. 2. his name is nick. 3. we are teachers. 4. i am a doctor. 5. my friends are engineers. 6. she is a housewife. 7. his daughter is a little girl. she is three years old. 8. they are good friends. 9. i am russian. i am from moscow. 10. he is fine now. 11. what are you? — i am a sociologist. 12. is he a teacher or a student? 13. she is a good student, isn't she? 14. what is your name? — my name is mary. 15. how old is your brother? — he is twenty-one. №4 1. mr. and mrs. brown have two children. both their children are boys. 2. miss smith is a teacher. her students are german. 3. we are french. our friends are english. 4. you are in bristol but your family is in york. 5. i have a small cat. my cat is very funny (смешной). 6. my daughter has a dog. its nose is long. 7. my friends have a new car. their car is very nice. 8. mary has a new bag. her bag is very big.