Has been

looked, watched
make
have
had looked

Are all of these in the past tense?
If they were all used in a paragraph would it still be in the same tense?
If not, which phrases/words should I change to fit the past tense?

Two of them are not past tense. Which are they?

make and have?

what if it was:

After I make ...
would it still be in the present ?
should it be After I had made

Let's finish your examples:

After I make the cookies, I will make the cake.

After I made the cookies, I made the cake.

Do you see the difference?

yes! thank you

No they are not. Use it in a sentence that makes it sound like it already happened. For example:

She already make the cake.
Or.....
She already made the cake.

See? Hope it helps!

Yes, all of the words and phrases you mentioned - "has been looked," "watched," "make," "have," and "had looked" - are in the past tense.

If you were to use all of these words and phrases in a paragraph, it would still remain in the past tense because they are all already in the past tense.

However, it is important to note that some of the phrases you mentioned, such as "has been looked" and "had looked," are in the present perfect and past perfect tenses respectively, which indicate an action that happened before another action in the past. If you want to keep everything in simple past tense, you would need to change these phrases.

To change "has been looked" to simple past tense, you could use "was looked" or "looked." For example, "He was looked after by his grandparents" or "They looked at the beautiful scenery."

To change "had looked" to simple past tense, you would use "looked." For example, "She looked out the window."

On the other hand, if you want to keep the present perfect and past perfect tenses, you can leave these phrases as they are and maintain the original meaning of the sentences.