by using:
be,verbs with ing,to,...
Future tense.
A prediction that you will be rather nervous in the near future.
The phrase shall have is a future tense; it is a prediction about what you are going to have in the future. Possibly the very near future ("I shall have a coffee and a donut").
Were is a past tense form of be. The future tense of be is will be.
Am, is, and are are present tense forms of be. The past tense forms of be are was and were. The future tense of be is will be.
The future tense is will carry.
The future tense of "seek" is "will seek." The future tense of "bring" is "will bring."
The future tense is will break.
The future tense of "was" is "will be."
Past tense - went. Future tense - will go.
The past tense is rained. The future tense is will rain.
"Which" is present tense and "will break" is future tense.