The infinitive is the base form of a verb that does not relate to any particular tense. In English, the infinitive usually uses the word "to" before the verb, such as "to speak" or "to eat." Infinitives can be used in several positions in a sentence, including as the subject or to indicate purpose. Certain verbs like "ask," "decide," and "understand" can be followed by a question word like "where," "how," "what," "who," or "when" plus an infinitive.

1. INFINITIVE AFTER QUESTION
WORDS
Mantilla Peña Dayana Isabel

2. What is the infinitve?
The infinitive is a form of the
verb that hasn’t had any
endings added to it and
doesn’t relate to any
particular tense. In English,
the infinitive is usually shown
with to.
to speak, to eat, to live.
Examples:

3. To form infinitives use
To + base form of the verb
I want to dance
Not + infinitive
To form negative infinitives use
He decided not to go to the party
Infinitive’s position in a sentence
1 Infinitive in a subject position
To live in the United States is my dream
2 Infinitive of purpose
I came here in order to learn
3
Too + adjective or adverb + infinitve
She is too Young to vote
4
Adjective or adverb + enough + infinitive
They are old enough to vote

4. The verbs: ask, decide, explain, forget, know,
show, tell, understand, can be followed by a
question word such as where, how, what,
who, when, or ‘wheter’ + infinitive

5. I’ve forgotten where to put this little
screw.
I can’t decide whether to wear the red
dress or the black one.
She asked me how to
use the washing machine
Do you understand what to
do?
Tell me when to press
the button.