Поставьте слова в отрицательную форму: 1.he works at the same factory. 2.my brother tells us nice stories. 3.i speak english well. 4.my sister helps me (to) do my homework. 5. those foreign students speak russian. 6.the librarin helps us (to) choose books for home reading. 7. we listen to his lectures on sundays.8. he reviews tge words every day. 9. mary schows me her new pictures.

He works - he doesn"t work, i speak - i don"t speak.  если стоят местоимения  he, she, it (или существительные и имена собственные, означающие    he, she, it),  то в отрицании будет doesn"t и окончание s (напр. works)  в конце глагола убирается,  а если i, we, you, то будет  don"t  . 

1.i  will take my sun-glasses in case it is sunny. 2. i don't think i can join you because my aunt and uncle will have been staying with us this weekend.  3. you don't work in class! i`ll phone your mother about this. 4. i will have been watching television from eight o'clock to midnight. 5. when will you repair my bike, daddy? — i`ll do it tomorrow if i have time. 6. it's so crowded in here. i think, i`ll faint. — i am taking you outside for a while. 7.1 don't know when the concert is over.  8. if he doesn't come i`ll be upset.  by the end of the summer he will have taught me to work with the computer. have a good time in italy! — thanks. i`ll send you a postcard.  11. i think you will like nick when you meet him.  12. i`ll cook spaghetti in case you get hungry. 13. i feel terrible. i think i`ll have to go to bed.  14. this is an excellent machine which will give you many years of service.