Stem Changing Rules

Question 1

Can stem changing words be followed by an infinitive?

Answer 1

Yea

Question 2

Empezar +?+ ? ( to start)

Answer 2

A+ infinitive

Question 3

Pensar + ?+? (To think about)

Answer 3

En+ noun

Question 4

Volver +? +? ( to do sum again)

Answer 4

A + infinitive

Question 5

Pensar + ? ( a continuing action )

Answer 5

Infinitive

Question 6

Seguir + ?

Answer 6

Present participle

Question 7

do stem changing -ir verbs change in their present participle form?

Answer 7

Yup