I know we use had when we want to tell of events in the past — e.g., The train had left the station before I reached station. My question is I want to write about an up-and-down trend in a line graph at different points. Assume I used simple past tense in the first two sentences in a paragraph. Now, in the third sentence I write:

The oil price had plunged to 200 barrels in 2000 before it surged to 600 barrels in 2005.

Should I write this without had? Is it optional?

I know we use had when we want to tell of events in the past — e.g., The train had left before I reached the station. I want to write about an up-and-down trend in a line graph at different points. Assume I used simple past tense in the first two sentences in a paragraph. Now, in the third sentence I write:

The oil price had plunged to 200 barrels in 2000 before it surged to 600 barrels in 2005.

Should I write this without had? Is it optional?

Sir iknow we use had when we want to tell two incidences in the past...eg..the train had left the station before I reached station...thats fine...now my question is...I want to write a up and down tend in a line graph at different duration...assume I used simple past tense in the first two sentences in a paragraph..now in the third sentence..I write"the oil price had plunged to 200 barrels in 2000 before it surged to 600 barrels in 2005". Or should I write without "had"...I want to know here had is optional or not?.plzzzzzzz help me

I know we use had when we want to tell of events in the past — e.g., The train had left the station before I reached station. My question is I want to write about an up-and-down trend in a line graph at different points. Assume I used simple past tense in the first two sentences in a paragraph. Now, in the third sentence I write:

The oil price had plunged to 200 barrels in 2000 before it surged to 600 barrels in 2005.

Should I write this without had? Is it optional?