hi, sorry, english is not my first language (I'm learning the basics now). Can someone help me with this problem? I know when to use has/have/had (they are past perfect and present perfect), but when should I use "has been"

oh, the the answer is "have" because it is plural

There are two ways this is used: 1.) First is plural/singular. Has is used with a singular noun. "The dog has the ball" Have is used with a plural noun. "The dogs have the ball" 2.) Second is used

by the way, can you help me with another similar problem? When and when not should I use "them" and "those"? (compare) I know "those" can be an adjective and a pronoun, and "them" can only be

thank you! Ur explanations are clear and helpful

thanks! if both "them" and "it" can be refered to things, which of the two is better to use? Are both grammatically correct?

I always thought that "them" was used as a pronoun refering to people, while "it" was used to refer to things. I came across this sentence though: "Medical studies are providing increasing evidence that alternative