Selectutorial - CSS selectors. Descendant selectors. Descendant selectors are used to select elements that are descendants of another element in the document tree. For example, you may wish to target a specific <strong> element on the page, but not all <strong> elements. However, if you use a descendant selector, you can refine the <strong> elements that you select.
Throw is an irregular verb. Throwed is not the past tense. Threw is the past tense.
Present Perfect Progressive. Present perfect progressive tense describes an action that began in the past, continues in the present, and may continue into the future. This tense is formed by using has / have been and the present participle of the verb (the verb form ending in-ing).