A lLots of cars were moving throughdown the street, and a lot of water werepuddles accumulated on the pavement, t. Then, a car drove too fast and threw water atsoaked the lady.

You don't need the 'a' and cars move 'down' not 'through' the street. 'Puddles' is more accurate than 'lots of water', 'soaked' rather than 'throw water' which would involve a person actually throwing water!

I stopped my car and I offered to help the old woman to carrying her to her destiny.

Extra 'p' in stopped and no need for the extra 'I'. 'Help' covers what you are doing.

She was very happy for my helpassistance.

Used 'assistance' so as not to say 'help' two sentences in a row.

It was a rainy afternoon, and a woman was walking on the sidewalk, carrying an unbrella.

A lot of cars were moving through the street, and a lot of water werehad accumulated on the pavement, t. Then, a car drovethat was driving too fast and threwsprayed water at theon a lady.

I stopped my car and I offered to the old woman to carrying herher a lift to her destiny.ation.

She was very happy for my helpthat I helped her.

It was a rainy afternoon, and a woman was walking on the sidewalk, carrying an unmbrella.

Spelling for "umbrella".

A lot of cars were moving through the street, and a lot of water werehad accumulated on the pavement, t. Then, a car drove by too fast and threwsplashed water at the ladywoman.

The sentence can get too long, so it's better to break it up into two.

I stopped my car and I offered to bring the old woman to carrying her to her destinyation.

Subject "I" already introduced so you don't have to say "I" again for "I offered". "Destination" is where she wants to go; "destiny" is more like her fate or something that can't be controlled.

She was very happy for my offer of help.

"My help" not commonly used so it may sound a little unnatural.

It was a rainy afternoon, and a woman was walking on the sidewalk, carrying an unmbrella.

A lot of cars were moving throughalong the street, and a lot of water were accumulatas gathered on the pavement, then, a. A car drove too fast and threwsplashed water at the lady.

I stopped my car and I offered to drive the old woman to carrying her to her destinyation.

Do you mean 'destination' here rather than 'destiny'?

She was very happy forto receive my help.

It was a rainy afternoon, and a woman was walking on the sidewalk, carrying an unmbrella.

A lot of cars were moving through the street, and a lot of water were accumulated on the pavement, and then, a car drove tooby fast and threwsplashed water at the lady.

I stopped my car and I offered to the old woman to carryinghelp her to her destiny.