Modal verb: can
6. Read again some excerpts from Text 1, on page
11, and pay attention to the words in bold. Then
use the words and expressions from the box to
complete the grammar explanation. Write down
the answers in your notebook.

You are learning that you really cannot have your own way all the time. [...]
This can be challenging and even frustrating, which can make you irritable and a bit hard
to live with at times [...]

cannot

habilidade ou capacidade

permissão

possibilidade

Can é um modal verb (verbo modal), isto é, um tipo de verbo auxiliar usado para
expressar ideias como possibilidade, probabilidade, obrigatoriedade, entre outras.
O modal verb can, em particular, expressa:

“This can be challenging".

My sister can play football.

: Can I taste your ice cream?

Assim como outros modal verbs, can tem a mesma forma para todas as pessoas
gramaticais.

Affirmative form
I can speak English.

Negative form
They / can't speak English.

Interrogative form
Can you speak English?​