I/you/we/they shop. He/she/it shops. The present participle is shopping.
Past continuous is formed by was/were + verb + -ing
was/were shopping
I was shopping last weekend
They were shopping last weekend.
The past participle (and simple past) is shopped.
shopped.
First of all, it should be "I went to the shop/shops", in general - you need a Definite Article (THE) after a preposition. The Present Tense form: "I go to the shop/shops". The Past Continuous form ("I was going to the shop") can be turned into a Present Continuous sentence: "I am going to the shop".
The past tense is schooled. The past continuous tense is 'was/were schooling'.
The simple past tense is "needed" The past continuous tense is "was/were needing"
Simple past tense - Awoke. Past continuous tense - I/he/she/it was awaking. You/we were awaking.
The past continuous tense is: was/were appearing.
Simple past tense. Past perfect tense. Past perfect continuous tense. Past continuous tense.
The past continuous tense of be is:I/She/He/It was being.You/We/They were being.
The past continuous tense is was/were having.I/He/She/It was havingWe/You/They were having
The past continuous tense of get is:I/He/She/It was getting.You/We/They were getting.
past = wentpast continuous = was going or were going.
The past continuous tense of study is:I/He/She/It was studying.You/We/They were studying.
The past continuous tense of buy is:I/He/She/It was buying.You/We/They were buying.