Question

**PFVR AJUDEM É PRA ENTREGAR QUARTA AGR**
21) Show the alternative that presents the right form of the follow sentences in the present perfect
tense.
1) Scientists warns about the climate changes.
a) Scientists is warning about the climate changes.
b) Scientists are warning about the climate changes.
c) Scientists have warned about the climate changes.
d) Scientists has warned about the climate changes.
e) Scientists have warning about the climate changes.
22)A lot of kids and teens get the acne vulgaris.
a) A lot of Kids and teens has getting the acne vulgaris
b) A lot of Kids and teens have getting the acne vulgaris.
c) A lot of Kids and teens have gotten the acne vulgaris.
d) A lot of Kids and teens was getting the acne vulgaris.
e) A lot of Kids and teens ware getting the acne vulgaris
23)The acne appears mainly on the face.
a) The acne has appering mainly on the face.
b) The acne have appeared mainly on the face.
c) The acne has appeared mainly on the face.
d) The acne is appearing mainly on the face.
e) The acne was appearing mainly on the face.
24) The climate changes make the world more dangerous
a) The climate changes are makeing the world more dangerous.
b) The climate changes is making the world more dangerous.
c) The climate changes have made the world more dangerous.​

Answer 1

⇒⇒  Present perfect

1)  Scientists warns about the climate changes.

a) Scientists is warning about the climate changes.

b) Scientists are warning about the climate changes.

c) Scientists have warned about the climate changes.

d) Scientists has warned about the climate changes.

e) Scientists have warning about the climate changes.

2)  A lot of kids and teens get the acne vulgaris.

a) A lot of Kids and teens has getting the acne vulgaris

b) A lot of Kids and teens have getting the acne vulgaris.

c) A lot of Kids and teens have gotten the acne vulgaris.

d) A lot of Kids and teens was getting the acne vulgaris.

e) A lot of Kids and teens ware getting the acne vulgaris .

3)  The acne appears mainly on the face.

a) The acne has appering mainly on the face.

b) The acne have appeared mainly on the face.

c) The acne has appeared mainly on the face.

d) The acne is appearing mainly on the face.

e) The acne was appearing mainly on the face.

24) The climate changes make the world more dangerous

a) The climate changes are makeing the world more dangerous.

b) The climate changes is making the world more dangerous.

c) The climate changes have made the world more dangerous.​

⇒⇒ Present Perfect >>> Indica quando a ação começou ou quanto tempo faz que ela está ocorrendo.

have >> usado com I - we - you - they

has   >> usado com he - she - it

Estrutura

Sujeito + have / has + verbo particípio + complemento

David has lived in Texas since 1990.

My sisters have studied English for many years.

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