Three. Use if present simple and the main clause is used with other auxiliary verbs may, must, needn't, ought to, should, can, be able to have the following meanings.
3. use the main clause Simple Present and if used with other verbs may help, must, should, ought to, needn't, can be able to get there, the meaning is as follows:
3.If using Present Simple and the main clause is used with other verbs help may, must, needn 't, ought to, should, can, be able to be there will be defined as follows: