Present progressive
AFFIRMATIVE
STRUCTURE Subject + verb to be + verb in gerund + complement
EXAMPLE you are listening to music
NEGATIVE
STRUCTURE Subject + verb to be + not + verb in gerund + complement
EXAMPLE you are not listening to music
INTERROGATIVE
STRUCTURE Verb to be + subject + gerund verb + complement?
EXAMPLE Are you listening to music?
Rules
1.In most cases, if the verb ends in a consonant we will limit ourselves to adding the ending that we already know, -ing: Study-Studying, Think-Thinking
2. If the verb ends in silent e, this letter is eliminated and the ending –ing is placed.
Have-Having, Write-Writing.
3. When the verb is a monosyllable that has a consonant-vowel-consonant in the last syllable, the last syllable is doubled and -ing is added: Swim-Swimming, Run-Running
4.For verbs that end in -ie, this ending is eliminated and one -and more -ing is added: Lie-Lying, Die -Dying
5.Verbs ending in the following consonants: -x, -y, -w, will not be doubled, only the ending -ing is added Strew-Strewing, Fix-Fixing
Exceptions
The nature of some verbs prevents their conjugation in the present continuous in English, so they do not usually have an -ing ending. These verbs are known as stative verbs.
Actitudes y gustos: dislike (disgustar), hate (odiar), like (gustar), love (amar), need (necesitar), prefer (preferir), want (querer), wish (desear)
Apariencias: appear (aparecer), look (parecer), resemble (asemenjarse), seem (parecer), sound (sonar).
Creencias: agree (estar de acuerdo), believe (creer), doubt (dudar), expect (esperar), forget (olvidar), imagine (imaginar), know (saber), notice (notar), realise (darse cuenta), remember (recordar), suppose (suponer), think (creer), understand (entender)
Percepciones: hear (oír), see (ver), smell (oler), taste (saber a)
Existencia y posesión: be (ser), belong to (pertenecer), come from (ser de), exist (existir), have (tener), lack (carecer), own (poseer), posess (poseer)
Otros: consist of (consistir en), contain (contener), cost (costar), depend (depender de), fit (caber), include (incluir), matter (importar), mean (referirse), need (necesitar), owe (deber), suit (sentar bien), weigh (pesar)