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As U.S. nuclear attack submarines prowl their familiar haunts deep within the oceans of the world these days, they increasingly are engaged in missions far different from the tasks for which they were built and for which their crews were trained over the last forty years.
[is, am, are] + Present participle(is going) is present continuous.
[was, were] + Past Participle(was gone) is present perfect
[is, am, are] + Past Participle (are engaged) Which tense is this?
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Simple present. They all form a logical pattern. You are wrong about present perfect, by the way. Emotion: sad

am, is, are + -ing Present continuous
was, were + -ing Past continuous

am, is, are + anything else Simple present
was, were + anything else Simple past

has, have + been + -ing Present perfect continuous
had + been + -ing Past perfect continuous

has, have + -en Present perfect
had + -en Past perfect

-ing is a symbolic way of indicating "present participle" (or "gerund" if you like that term better)
-en indicates "past participle" (even if the ending is something else like -ed)

CJ
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CalifJimSimple present. They all form a logical pattern. You are wrong about present perfect, by the way. Emotion: sad
am, is, are + anything else Simple present
was, were + anything else Simple past
CJ thanks a zillion. Trust me I didn't know that anything (except present participle) that follows is, am are or was, were is simple present and simple past respectively.
CalifJimYou are wrong about present perfect, by the way.
That was my mistake. Sorry about that.

And thanks for the logical form. I am going to paste it on my desktop (as I previously did your other post about does-show, does-go rather than goes and shows - a typical mistake that I always make).

GB
CalifJimam, is, are + anything else Simple presentwas, were + anything else Simple past
Could you explain what you mean by that? scratches head An example maybe? Because I'd have expected to find copula + adjective here. As in "I'm engaged."

Thank you.
am, is, are, was, were + [noun / adjective / adverb / prep. phrase]

are all "copula + ",
but at the same time they are present or past tense (I'm engaged, He was in the garage, We are here, They are tall).

CJ
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hi I confuse about I,am,are and be because be is a simple present as well of was/were isn't ,sorry I'm not very well in English ..can you please explain to me thanks
The present simple of the verb BE:

I am
you/we they are
he/she/it is

The past simple of the verb BE:

I was
you/we/they were
he/she/it was

all the remaining parcels are delivered. is this correct?

Students: We have free audio pronunciation exercises.

I am done.

she was filled.

I am not satisfied.

They were jumped.

Are these all am/is/are + anything - Simple present and past tense.

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