PRESENT:
I always go to the shop - simple
I am going to the shop now - continuous
I have gone to the shop - perfect
I have been going to the shop for months - perfect continuous
PAST:
I went to the shop yesterday - simple
I was going to the shop at 6pm yesterday - continuous
I had gone to the shop before the tv show began - perfect
I had been going to the shop for 8 years when I realized that... - perfect continuous
FUTURE:
I will go to the shop tomorrow - simple
I will be going to the shop tomorrow at 10pm - continuous
I will have gone to the shop by 6pm tomorrow - perfect
I will have been going to the shop for 8 years tomorrow - perfect continuous
FUTURE IN THE PAST:
I knew I would go to the shop -simple
I knew I would be going to the shop at 6 am -continuous
If I had known it I would not have gone to the shop -perfect
She told me she would have been going to the shop for 30 years next December. - perfect continuous