Put the verbs into the PRESENT PERFECT SIMPLE, PRESENT PERFECT CONTINUOUS.
a) I (not/be) to the new electronics shop yet.
b) Mary (pack) all morning.
c) He (know) the Smiths for 5 years.
d) … you (/already / buy) this book?
e) How long … (you / write) your essay?
f) I … (swim) from 7 till 8. I am so tired.
g) Granny ... (go) to the bakery. She’ll be back soon.

a) I have not been to the new electronics shop yet.  (Present Perfect)

b) Mary has been packing all morning.  (Present Perfect Continuous)

c) He have been knowing the Smiths for 5 years.  (Present Perfect Continuous)

d) Have you already bought this book?  (Present Perfect)

e) How long have you been writing your essay?  (Present Perfect Continuous)

f) I have been swimming from 7 till 8. I am so tired.  (Present Perfect Continuous)

g) Granny has gone to the bakery. She’ll be back soon. (Present Perfect)

Объяснение:

a) I haven't been (not/be) to the new electronics shop yet.

b) Mary has been packing (pack) all morning.

c) He has been knowing (know) the Smiths for 5 years.

d) Have you already bought (/already / buy) this book?

e) How long have you been writing (you / write) your essay?

f) I have been swimming (swim) from 7 till 8. I am so tired.

g) Granny has gone (go) to the bakery. She’ll be back soon.