teacher Denise Moraes catteacher.com.br
Past modal of ability → could
The team won the game because they could play better
Structure they could play better noun pronoun
could
base form verb
catteacher.com.br
teacher Denise Moraes
ability
Mozart could compose by the age of five ability
Structure Mozart could compose noun pronoun
could
base form verb
Past modal of inability → couldn’t
She couldn’t learn the subject, so she got bad grades inability
she couldn’t learn the subject noun pronoun
could + not
base form verb
He got mad because he couldn’t use the computer inability
Structure
he couldn’t use the computer noun pronoun
could + not
base form verb
catteacher.com.br
teacher Denise Moraes
Structure
Past modal of obligation → had to
Structure she had to wear a raincoat had to noun pronoun
base form verb
He had to stay in bed because he was sick obligation Structure he had to stay in bed had to noun pronoun
base form verb
catteacher.com.br
teacher Denise Moraes
It was raining, so she had to wear a raincoat obligation
Past modal of lack of obligation → didn’t have to
It was Sunday, so they didn’t have to go to school Structure they didn’t have to go to school noun auxiliary pronoun verb in the past
have to
base form verb
catteacher.com.br
teacher Denise Moraes
lack of obligation
We didn’t have to study Math last night lack of obligation
Structure we didn’t have to study Math noun auxiliary pronoun verb in the past
have to
base form verb
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teacher Denise Moraes catteacher.com.br (11) 93342-5158
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