Can use contained in sentence

Answer 1

Obviously you're supposed to put contains when "something contains something else" such as "That jar contains food." then contain in a present tense sentence like "Can you contain your dog, please?"

Like any other verb, the correct usage depends upon the necessary conjugation:

To contain ("I use my fence to contain my dog")

I, you, we, they contain ("The teacher asked us to contain our laughter.")

It, he, she contains ("The flask contains the chemicals.")

Answer 2

First of all, you need to know what contained means. Contain means - to hold or to have inside, to hold back. Contained is past tense though, so it will be: to have held or to have had inside, to have held back.

You can use it in a sentence like this:

• The jar contained strawberry jam.
• She contained her anger. (as in held back)

Some synonyms for the word 'contained' are:

• accommodated (held)
• comprehended
• comprised
• embodied (held)
• embraced (held back)
• enclosed
• included (held)
• restrained (held back)

Just be careful which synonym you use - some mean to hold back, others mean to hold.