The preposition 'for' is used to denote a specific amount of time in which someone or something was performing an action. For example, 'I have been looking for my dog for some time now.' Here, 'for some time now' represents not an exact but particular amount of time. The word 'since', on the other hand, refers to a particular point of time from when the action started/began in the past to the present. It indicates that the action is continuing. For example, 'Raj has been living in London since 2003.'
Here are a few more examples to help you understand how the two prepositions are used.
Bruce has been travelling for the past two weeks.
Neethu will be here for a few hours.
I have known you since you were a kid.
Shanti has been working as a content writer since 2018.
use 'will' for affirmative and negative sentences about the future. Use 'will' for requests too. If you want to make an offer or suggestion with I/we, use 'shall' in the question form. For very formal statements, especially to describe obligations, use 'shall'.
I will have to study very hard, . . . . . . . . I can pass the exam.
We use 'so that' and 'in order that' to talk about purpose. We often use them with modal verbs (can, would, will, etc.). 'So that' is far more common than 'in order that', and 'in order that' is more formal.
The simple present tense form of the verb 'get' is used in the above sentence.
A simple Present Tense is a form of the verb used when an action is taking place in the present time or happens regularly.