Have been and -ing
The auxiliary verbs have and been and a main verb in the –ing form:
|auxiliary have been||-ing form|
A verb phrase with have, been and the -ing form expresses both perfect aspect and continuous aspect. A verb with have/has expresses present perfect continuous and a verb with had expresses past perfect continuous.
Modal verb and be, have and have been
A modal verb and the auxiliaries be, have and have been:
Be and past participle
The auxiliary verb be and a main verb in the past participle form:
|English||is||spoken||all over the world.|
|The windows||have been||cleaned.|
|The work||will be||finished||soon.|
|They||might have been||invited||to the party.|
A verb phrase with be and the past participle expresses passive voice.
|Take note (advanced level)|
We can use the auxiliaries do and did with the infinitive for emphasis:
We can also use do for polite invitations: