I tried to extract data from my client's system. I tried to extract data from my client's system.

Need the " 's " to show possession

I tried to extract data from my clients' system. I tried to extract data from my clients' system.

I tried to extract data from my client's system., I tried to extract data from my client's system,

But, I didn’t know wellmuch about the system. But, I didn’t know much about the system.

But I didn’t know well about the system well. But I didn’t know the system well.

But I didn’t know well about the system very well. But I didn’t know about the system very well.

Bbut I didn’t know wellenough about the system.it, but I didn’t know enough about it,

So, it took a long time to understand how the is structure is defined. So, it took a long time to understand how the is structure defined.

So it took a long time to understand howits structure is defined. So it took a long time to understand its structure.

This sentence can also be combined with the 2 previous sentences: "I tried to extract data from my client's system but I didn't know their system well so it took a long time to understand its structure."

So it took a long time to understand how the structure is defined. So it took a long time to understand how the structure is defined.

Sso it took a long time to understand how it was structure is defined. so it took a long time to understand how it was structured.

And finally, I couldn’t finish my task. And finally, I couldn’t finish my task.

And finallyIn the end, I couldn’t finish my task. In the end, I couldn’t finish my task.

And finallyt the end of the day, I couldn’t finish my task. At the end of the day, I couldn’t finish my task.

I was so disappointed.. I was so disappointed.

I was so disappointed... I was so disappointed...

Today, I was not happy day. Today, I was not happy day.

Today was not a happy day. Today was not a happy day.

Today was not a happy day. Today was not a happy day.

Today was not a happy day. Today was not a happy day.

I wasted so much time during my working hours. I wasted so much time during my working hours.

I wasted so much time during working hours. I wasted so much time during working hours.

I wasted so much time during my working hours day. I wasted so much time during my work day.