This is the easiest conditional.
Present + Present
Zero conditional
4
Stealing someone's identity
IDENTITY THEFT
GERUND
This is a modal in past you use to express a possibility.
COULD HAVE + PARTICIPLE
MIGHT HAVE + PARTICIPLE
Conditionals can be classified into "real" and...
"unreal"
The first conditional is a combination of:
Present +
Future (will, can or may)
Entering someone's home (illegally) to steal:
TRY + _____________
(something new, an experiment)
INFINITIVE
You can use this modal in past to express regret
SHOULD HAVE + PARTICIPLE
This conditional talks about a real possible future:
1st conditional
The second conditional uses this tense in the first half (the cause)
PAST TENSE
A crime that consists in making false promises in which the "seller" takes advantage of the victim
CON, FRAUD, SCAM.
REMEMBER +
(IN THAT MOMENT)
INFINITIVE
MUST HAVE + PARTICIPLE
The most common conditional for hypothetical situations.
2nd conditional
WOULD, (COULD, or MIGHT)
CON-ARTIST
MODAL VERBS +
INFINITIVE without TO
SIMPLE FORM
This modal in past is used to express that something was IMPOSSIBLE.
THE PAST
The third conditional is a combination of past perfect and
past modals OR modals + present perfect
(NOT robbery or assault)
MUGGING
AVOID
GERUND
What's the problem with the following sentence using a modal in past:
"He could have a problem."
It's missing the verb in participle.
He could have HAD a problem.