Most of the following sentences lack at least one period, question mark, exclamation point, comma, semicolon, or colon. Add the correct punctuation where it is needed

1. I looked for my keys in the kitchen on the porch and under the bed but still couldn't find them.

2. No one in my family could slice it with even our sharpest knife nor were we able to cut off a piece even
with a saw

3. In keeping with your company's money-back guarantee please return my payment the total including shipping and handling is $29.95

1. I looked for my keys in the kitchen, on the porch, and under the bed; but still couldn't find them.

2. No one in my family could slice it with, even our sharpest knife, nor were we able to cut off a piece even, with a saw.

3. In keeping with your company's money-back guarantee, please return my payment, the total including shipping and handling is $29.95.

1 - incorrect

2 - incorrect
3 - incorrect

Watch where to use the semi-colon

In #2, two commas are misplaced - not needed.

1. 1. I looked for my keys in the kitchen, on the porch, and under the bed, but still couldn't find them.

2. No one in my family could slice it with even our sharpest knife, nor were we able to cut off a piece even
with a saw.

3. In keeping with your company's money-back guarantee please return my payment, the total including shipping and handling is $29.95.

1 is now correct

2 needs one more comma.
3 needs a comma and a semi-colon.

2. No one in my family could slice it with even our sharpest knife, nor were we able to cut off a piece, even with a saw.

3. In keeping with your company's money-back guarantee, please return my payment; the total including shipping and handling is $29.95.

Great job on adding the correct punctuation! Here are the revised sentences with the correct punctuation:

1. I looked for my keys in the kitchen, on the porch, and under the bed, but still couldn't find them.

2. No one in my family could slice it with even our sharpest knife, nor were we able to cut off a piece even with a saw.

3. In keeping with your company's money-back guarantee, please return my payment. The total, including shipping and handling, is $29.95.

In sentence 1, commas are added to separate the different places the person looked for the keys, and a comma is placed before the coordinating conjunction "but" to join the independent clauses.

In sentence 2, a comma is added after the phrase "with even our sharpest knife" to separate it from the following clause, and another comma is added after the phrase "even with a saw" for the same reason.

In sentence 3, a comma is added after "guarantee" to separate the introductory phrase from the main clause, and a period is added at the end of the sentence to indicate the end of the sentence. Additionally, a comma is used to separate the items in the total amount.

Remember, punctuation is important to clarify meaning and make sentences easier to understand.