What is the simple subject? maria is my cousin.

a). He has liked jazz since he was at college.

b). She has been learning to swim since September.

c). They have lived together and moved in together last year.

d). She has been working in a store since last May.

e). I have been playing the guitar since I was eight.

f). We have had a motorcycle for three years.

Explanation:

The Simple present perfect tense is characterized as the tense that is employed to indicate a completed action that started in the past and bears its consequences in the present. It is framed using the auxiliary 'to have'(indicates present consequences) + past participle form of the verb.

While present perfect progressive tense is primarily employed to express the actions that began in the past and is continued until the present moment. It helps in highlighting the duration for which the action has been occurring. It is framed using 'have been + V1 + ing + since/for + time.'