Cual es el pretérito perfecto simple o pretérito imperfecto de cada verbo?

Mary just sent out invitations to her wedding last week the invitations were so heavy that she put more than just one stamp on each envelope she used 255 stamps and mailed out 85 invitations and see you as an equal amount of stamps on each envelope

Fill in the blank with the correct form of preterite or imperfect of the verb in parentheses. nosotros a la playa con ana ayer. (ir) answer for blank 1:

Okay so i'm taking an online spanish course (penn foster), and in the study guide, you have to create a bunch of sentences with words you've learned so far. translating, reading, and those kinds of things are fairly easy, but when it comes to making my own sentences, my brain just kinda waltz's away. anyone got any tips?