Grammatical Tenses

Existed is the past tense. The past perfect tense is had existed.

The past tense of "lie down" is "lay down", and the past participle is "lain down".

The tenth rule of subject-verb agreement states that collective nouns, such as "team" or "family," can either be singular or plural depending on the context of the sentence. For example, "The team is playing well" (singular), and "The team are arguing amongst themselves" (plural).

The past participle of "adopt" is "adopted."

The past tense of "stick" is "stuck" and the past participle is also "stuck."

will host

London will host the Olympics in a few days.

The past participle of acquire is acquired.

Ex: She acquired a new wealth of knowledge on WikiAnswers

The past tense of "cling" is "clung," and the past participle is also "clung."

Will approach

The tense of the sentence is past. The action of hiking the mountain occurred after a long ride in the junky bus.

The past participle is blamed.

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".

Some examples of present perfect continuous tense are:

• She has been studying for the exam all week.
• They have been waiting for the bus for half an hour.
• I have been working on this project since last month.

The past participle of "go up" is "gone up."

The future tense of pull is will pull.

No, only the present participle form always ends in -ing.

The past form of "tell" is "told," and the past participle is also "told."

The present progressive form, also known as present continuous, is a verb tense used to describe actions that are currently happening or in progress. It is formed by combining a form of the verb "to be" with the present participle of the main verb (ending in -ing). Example: "She is reading a book."

The past tense of "deal" is "dealt" and the past participle is also "dealt."

The past future tense of "happen" is "would happen." For example, "He said the event would happen next week."

The tense forms of "deal" are:

• Present: deal
• Past: dealt
• Present participle: dealing
• Present perfect: have dealt
• Past perfect: had dealt
• Future: will deal

Does is the present tense, third person singular conjugation of the verb do. The past tense of do is did, and the future tense is will do.

The past participle of work is worked.