Tenses

Present Continuous
Positive:
Formula:	Sub. + Helping Verb + Verb (I form) + ing + Obj.
Subject:	He, She, It
Helping Verb:	Is
Example:	He is writing a letter. She is writing a letter. It is raining.
Subject:	I
Helping Verb:	Am
Example:	I am writing a letter.
Subject:	We, They, You
Helping Verb:	Are
Example:	We are writing a letter. They are writing a letter. You are writing a letter.

                                   

Negative:
Formula:	Sub. + Helping Verb + not + Verb (I form) + ing + Obj.
Subject:	He, She, It
Helping Verb:	Is
Example:	He is not writing a letter. She is not writing a letter. It is not raining.
Subject:	I
Helping Verb:	Am
Example:	I am not writing a letter.
Subject:	We, They, You
Helping Verb:	Are
Example:	We are not writing a letter. They are not writing a letter. You are not writing a letter.

 

Single Interrogative:
Formula:	Helping Verb + Sub. + Verb (I form) + ing + Obj.
Subject:	He, She, It
Helping Verb:	Is
Example:	Is he writing a letter? Is she writing a letter? Is it raining?
Subject:	I
Helping Verb:	Am
Example:	Am I writing a letter?
Subject:	We, They, You
Helping Verb:	Are
Example:	Are we writing a letter? Are they writing a letter? Are you writing a letter?

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Single Interrogative + Negative:
Formula:	Helping Verb + Sub. + not + Verb (I form) + ing + Obj.
Subject:	He, She, It
Helping Verb:	Is
Example:	Is he not writing a letter? Is she not writing a letter? Is it not raining?
Subject:	I
Helping Verb:	Am
Example:	Am I not writing a letter?
Subject:	We, They, You
Helping Verb:	Are
Example:	Are we not writing a letter? Are they not writing a letter? Are you not writing a letter?

 

Double Interrogative:
Formula:	W’s + Helping Verb + Sub. + Verb (I form) + ing + Obj.
Subject:	He, She, It
Helping Verb:	Is
Example:	Why is he writing a letter? Why is she writing a letter? Why is it raining?
Subject:	I
Helping Verb:	Am
Example:	Why am I writing a letter?
Subject:	We, They, You
Helping Verb:	Are
Example:	Why are we writing a letter? Why are they writing a letter? Why are you writing a letter?

 

Double Interrogative + Negative:
Formula:	W’s + Helping Verb + Sub. + not + Verb (I form) + ing + Obj.
Subject:	He, She, It
Helping Verb:	Is
Example:	Why is he not writing a letter? Why is not she writing a letter? Why is not it raining?
Subject:	I
Helping Verb:	Am
Example:	Why am I not writing a letter?
Subject:	We, They, You
Helping Verb:	Are
Example:	Why are we not writing a letter? Why are they not writing a letter? Why are you not writing a letter?

 

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