Possessive apostrophes show who or what owns something. The apostrophe goes in a different place depending on whether the owner is singular (one) or plural (more than one). Be careful with the word ...

We will introduce 50 essential English sentences to solidify the 'foundation (basics) of English' needed to pass Eiken Grade 5 and Grade 4 (roughly junior high school 1st to 2nd year level) and make ...