This=for something singler and near to you.
That= for something singular and for from you .
Give me this books
Give me that books
====================================
Simple present (singuler):\
Ahmed \sarah\he\she\ ..walksto school every duy
When subject is singular add s to the verb
Simple present (plural);\
Ahmed and sarah \thay walk X to school every day.
When the subject is plural do not add s to the verb.
Using be (presnt) ;\
Be ->>>is-am-are
Ahmed\sarah\he\she\it..is there
Ahmed and sarah\thay are in the room
Iam… in school