Jawaban:

- we study, she studies

- they fly, it flies

- they wash, she washes

- i clean, he cleans

- we play, she plays

- you watch, he watches

- you like, he likes

- i go, she goes

- they bark, it barks

- i carry, he carries

- we cry, she cries

- they fix, he fixes

- i smoke, she smokes

- we swim, she swims

- i buy, he buys

- they write, he writes

- you sing, he sings

- we think, he thinks

(-) he doesn't teach english in this school

(?) does he teach english in this school?

(-) i don't go to london every year

(?) do you go to london every year?

(-) she doesn't her homework in the evening

(?) does she do her homework in the evening?

(-) we don't watch TV every day

(?) do you watch TV every day?

(-) she usually doesn't get home at three o'clock

(?) does she usually get home at three o'clock?

(-) they often don't buy in that shop

(?) do they often buy in that shop?

correct me if i'm wrong, thanks