02 (EM, Writing): Drills and saws

There are types of power tools: electric handheld, electric stationary, air ones and outdoor power equipment. 

There isn't types of power tools: electric handheld, electric stationary, air ones and outdoor power equipment. 

There was types of power tools: electric handheld, electric stationary, air ones and outdoor power equipment. 

Are there were types of power tools: electric handheld, electric stationary, air ones and outdoor power equipment?

Circular saws are so unknown.

Circular saws are more widespread.

Circular saws are the most widespread.

Circular saws are obsolete.

They use the rotary motion of a toothed or abrasive blade to cut different materials, such as wood, masonry, or metal. 

They uses the rotary motion of a toothed or abrasive blade to cut different materials, such as wood, masonry, or metal. 

They use the rotary motion of a toothed or abrasive blade to cutting different materials, such as wood, masonry, or metal. 

It was used as the rotary motion of a toothed or abrasive blade to cut different materials, such as wood, masonry, or metal. 

Although the saw is generally surrounded by a frame for safety, be always careful.

Although the blade are generally surrounded by a frame for safety, be always careful.

Although the saw aren't generally surrounded by a frame for safety, be always careful.

Although the blade is generally surrounded by a frame for safety, be always careful.

Screwdrivers are a type of circular saw that slides on a guide rail.

Track saws can't a type of circular saw that slides on a guide rail.

Track saws are a type of circular saw that slides on a guide rail.

Track saws must a type of circular saw that slides on a guide rail.

Slides helps to get long and precise cuts.

Sliding helps to get long and precise cuts.

Hammers help to get long and precise cuts.

Sliding helps to get longer and precise cuts.

Some of hammers have a riving knife that follows the blade. 

Some of drills have a riving knife that follows the blade. 

Some saws have a riving knife that follows the blade. 

Some of hammer have a riving knife that follows the blade. 

is a type of rotary drill.

is a type of concrete drill.

can a type of iron drill.

is a type of rotary saw.

such as concrete, iron, or stone.

such as concrete, porridge or stone.

such as silk, masonry, or stone.

such as concrete, masonry, or stone.

perform tasks such as screwdriving, ceramics, or metalwork.

perform tasks such as cutting, wood, or metalwork.

tasks such as screwdriving, wood, or metalwork.

perform tasks such as plastic, wood, or metalwork.

It is not always easy to...

It might not always easy to

It is not sometimes easy to

it is not never easy to

keeping the driver bit fully engaged with the screw head. 

keeps the driver bit fully engaged with the screw head. 

keept the driver bit fully engaged with the screw head. 

was keeps the driver bit fully engaged with the screw head.