Question

Write these sentences in the negative and interrogative forms.

a)She has planned this trip since 1999.
b)They have cut the grass.
c)The students have written letters to their parents.

Answer 1

a-has she planned this trip since 1999?
she hasn't planned this trip since 1999

b-have they cut the grass?
they haven't cut the grass

c-have the students written letters to their parents?
the students haven't written letters to their parents