| I ( be ) lost. ( tomorrow ) | |
| I ( be ) lost. ( until tomorrow ) | |
| I ( be ) lost. ( now ) | |
| I ( be ) lost. ( if it were not for this map ) | |
| I ( be ) lost. ( since yesterday ) | |
| I ( be ) lost. ( yesterday ) | |
| I ( be ) lost. ( before I met you ) | |
| I ( be ) lost. ( without your help last week ) | |
| I ( do ) my homework. ( tomorrow ) | |
| I ( do ) my homework. ( at this time tomorrow ) | |
| I ( do ) my homework. ( by tomorrow morning ) | |
| I ( do ) my homework. ( brefore going to bed evert day ) | |
| I ( do ) my homework. ( now ) | |
| I ( will do ) my homework. ( if I had a tablet PC ) | |
| I ( do ) my homework. ( already / just / yet? ) | |
| I ( do ) my homework. ( since this morning ) | |
| I ( do ) my homework. ( an hour ago ) | |
| I ( do ) my homework. ( before I met you ) | |
| I ( can do ) my homework. ( if you had helpd me ) | |