Using conjunctions to join sentences

Home learning focus

To use joining words when writing sentences about the ocean.

This lesson includes:

  • a video to help you use joining words

  • three activities to do at home


Play the short video below to find out about joining words.

See if you can spot all the times 'and' is used to join sentences.

Joining words are also known as conjunctions. They can be words like: and, because, if and when.

They can be used to add more information to a sentence. For example:
I like fish and chips.

They can also be used to join two different clauses together. A clause is a group of words that contain a subject and a verb. For example:
I stayed inside because I was grounded.

The good thing about because, if and when is that we can use them at the beginning or the middle of a sentence.

For example:
I was late because I missed the bus.
Because I missed the bus, I was late.


You may need paper and a pen or pencil for some of these activities.

Activity 1: Let's join our ideas

See if you can identify all the joining words in this short activity.

Activity 2: Discover the ocean

Watch this short video to find out about the ocean, then try the activity below.

Try and remember as much information about the ocean as possible.

There are lots of different things you can see in the ocean.

Rewrite the sentences below by moving the conjunction to the start of the sentence. The first one has been done for you.

  • The ocean is wet because it is full of water.
    Because it's full of water, the ocean is wet.

  • Whales are really big because they eat lots of Plankton.

  • You would be surrounded by water if you were in the middle of the ocean.
  • There are lots of fish that live in the ocean because it is so huge.

Activity 3: Writing some sentences using 'because', 'if' and 'when'

Think about what you watched in the video above. There were lots of things to see in the ocean.

  • Write six sentences about the ocean using because, if or when. Try and do two sentences per conjunction.
  • Remember to use capital letters at the start and correct punctuation.

Here is an example:
Seaweed grows close to the surface because it uses the sun.

Where next?

In this lesson you have practised using conjunctions in sentences when writing about the ocean.

There are other useful articles on Bitesize to help you.

There's more to learn

Bitesize Daily lessons
More from KS1 English
Bitesize games
KS1 English
Discover more writing tips