Does your employer's location have GPS with themselves? (I’m not sure what you’re asking with ‘with themselves?’ If you explain a little more, I can help you find the right words to use) Does your friend have a mobile? When should I use Do/Does | Have/Has — I, we, you, they: use DO and HAVE He, she, it: use DOES and HAS Do (I/we/you/they) have a pencil? Does (he/she/it) have a pencil? Yes, (I/we/you/they) have a pencil. Yes, (he/she/it) has a pencil. In your sentence above ‘your employer’s location’ can be substituted with the pronoun ‘it’. And ‘your friend’ is a ‘he/she’ so you use DOES. So that’s a trick to know which to use! **The rules I explained above are for auxiliary verbs. The HAVE in both example sentences is the main verb (not the auxiliary verb) so you use the plain form of HAVE. Yes, she does have a pencil.

Hi Ramin! Do your employers' (or do you mean employee?) location have GPS with themselves? Does your friend have a mobile? Do/does: Depends on the subject (singular/plural) Has/have: Since you already mentioned singular/plural for 'do/does', so you can remain in base form for 'has/have' which is 'have'. I'm an English learner as well so correct me if I'm wrong! Thanks!