he/she/it. if it is singular we use " has to". you/we/I/they if it is plural we use "have to".

1. this - is a singular noun used in a present tense. 2. these - is a plural noun used in a present tense. 3. there - is a singular noun used in a past tense. 4. those - is a plural noun used in a past tense.

it's very simple. you have to play all the game like news, puzzles and daily homework etc., that'll increase more coins.

you should pronounce properly. maybe it will take some times for catchup our voices. If you try do it everyday.surely one-day you'll understand how to pronounce a vocabularies. That will improve your pronunciation..

yes it is!. you have to practice well everyday. and remained it too ,"attitude makes you perfect".

both does and do are used for question type. does - he/she/it. (Singular) do- they/you/l/we. (plural)

it means how are you.

it is a musical instrument.

https://helloenglish.com/article/124/English-tenses-and-their-usage see this link you'll know about it.

one having charge of buildings or grounds or animals. steward word is used only for males