Jawaban:

• Simple Present:

(+) They sing a song

(-) They don't sing a song

(?) Do they sing a song?

• Présent Continuous:

(+) They are singing a song

(-) they are not singing a song

(?) are they singing a song?

• Present Perfect:

(+) they have sung a song

(-) They have not sung a song

(?) have they sung a song?

• Present Perfect Continuous:

(+) They have been singing a song

(-) they have not been singing a song

(?) have they been sing a song?

Penjelasan:

• Simple présent (rutinitas, fakta)

(+) Subjek+ Verb 1 / +s/es + Object

(-) Subject + doesn't/don't + Verb 1 + Object

(?) do/does + Subject + Verb 1 + Object?

• Present continuous (sedang berlangsung)

(+) Subjek + be (is,am,are) + Verb 1 ing + Object

(-) Subjek + be (is,am,are) + not + Verb 1 ing + Object

(?) be (is,am,are) + Subjek + Verb 1 ing + Object?

• Present Perfect (masih berlanjut)

(+) Subjek + have/has + Verb 3 + Object

(-) Subjek + have/has + not + Verb 3 + Object

(?) have/has + Subjek + Verb 3 + Object?

• Present Perfect Continuous (masih sedang berlanjut)

(+) Subjek + have/has + been + Verb 1 ing + Object

(-) Subjek + have/has + not + been + Verb 1 ing + Object

(?) have/has + Subjek + been + Verb 1 ing + Object?

Dengan catatan:

> Verb 1 ditambah s/es dan does dan penggunaan is, has, jika subject he,she,it / 1 nama orang

> Verb 1, penggunaan do, have, are untuk subject they,we,you / +2 orang

> subject I menggunakan do, verb 1, have, dan am.