1. He is doing homework now

(-) He is not doing homework now

(?) Is he doing home work now?

2. We are flying kite at the moment

(-) We are not flying kite at the moment

(?) Are you flying kite at the moment?

3. The girls are skipping at present

(-) The girls are not skipping at present

(?) Are the girls skipping at present?

4. I am eating an apple now

(-) I am not eating apple now

(?) Are you eating apple now?

Ta có công thức thì hiện tại tiếp diễn:

Ss_ít + is +V_ing + O

Ss_nhiều + are + V_ing + O

* I + am + V_ing + O

1. (-) He isn't doing homework now
    (?) Is he doing homework now?
2. (-) We aren't flying kites at the moment
    (?) Are you flying kites at the moment?
3.(-) The girls aren't skipping at present
   (?) Are the girls skipping at present?
4.(-) I am not eating an apple now
  (?) Are you eating an apple now
Công thức thì HTTD : S + tobe (is/am/are) +Ving + O