yes you do
The past tense of lease is leased.
If they were frozen before the expiration date, there shouldn't be a problem. If they have been in the refrigerator, toss them.
Expired is the past tense of expire.
Yes, it has been a approved for military use in overseas U.S. bases for up to 2 years past it's expiration date.
It should be if the package has not been opened.
It is an old code that has been long gone past expired. Sorry.
Expiration is a noun. The verb form is expire, and the past tense is expired.
The word 'expired' is the past participle, past tense of the verb to expire. The past participle of the verb also functions as an adjective.The noun forms of the verb to expire are expiration and the gerund, expiring.
He died in 2011.
leased
It could be correct in the right context: "The time for returning this library book without a fine has been expired for two days", although it would be more idiomatic to substitute "The time for returning this library book without a fine expired two days ago".
Yes. It is the past tense and past participle of to expire, and applies to thing that have expired (licenses, sales, and even people, where it is a euphemism for died).