Don’t say: 
– I see you tomorrow.
– I go with you now.
– I do my homework next weekend.
– I tell you when she comes home.
– I call you Monday.

Say this:
– I’ll see you tomorrow.    (I will see you tomorrow)
– I’ll go with you now.
– I’ll do my homework next weekend.
– I’ll tell you when she comes home.
– I’ll call you Monday.

Remember:

• Use I’ll as the shortened form of I will when talking about something you will do.
• I’ll = I + will 
• Be sure to pronounce the whole word, not just the I
• Listen to a lot more people pronounce I’ll on YouGlish