Jawaban:

6.(+)The boys are eating lunch now

(-)The boys are not eating lunch now

(?)are the boys eating lunch now?

7.(+)She understands all this subject this morning

(-)She does not understand all this subject this morning

(?)Does she understand all this subject this morning?

8.(+)I spent the time to Bukit Lawang last month

(-)I did not spend the time to Bukti Lawang last month

(?)Did you spend the time to Bukit Lawang last month?

9.(+)My mother says something secret to me

(-)My mother does not say something secret to me

(?)Does my mother say something secret to me?

10.(+)They knew all information this morning

(-)They did not know all information this morning

(?)Did they know all information this morning?

Penjelasan:

present continuous tense nomor enam ditandai dengan tobe is am are

nomor 7 Dan 9 present tense ditandai dengan kata kerja pertama

nomor 8 Dan 10 kata kerja lampau berarti past tense