English Auxiliary Verbs

Front

be

Back

Base form of the verb 'to be'.

Front

am

Back

First person singular present form of 'to be'.

Front

is

Back

Third person singular present form of 'to be'.

Front

are

Back

Present form of 'to be' for all persons except third person singular.

Front

was

Back

First and third person singular past form of 'to be'.

Front

were

Back

Past form of 'to be' for all persons except first and third person singular.

Front

been

Back

Past participle form of 'to be'.

Front

being

Back

Present participle form of 'to be'.

Front

could

Back

Past form of 'can', used to indicate possibility or ability in the past.

Front

should

Back

Used to indicate obligation, duty, or correctness, often when criticizing someone's actions.