Introduction
The clause that لـ precedes must have a plain-form present tense verb (the verb cannot have the prefix بـ which marks habitual action or the prefix هـ/حـ which marks the future). If the clause does not contain a plain-form present tense verb, then the helping verb يكون / تكون is used.
This idea can also be expressed with لو as in
.....تبقى مصيبة سودا لو
......تبقى مصيبة لو
......مصيبة بقى لو
Examples
Example 1
يا استاذ! يا افندي! مصيبة لـيكون مات |
| Sir! Sir... It will be a disaster if he's dead.
(على جثتي) |
Example 2
مصيبة لـتكون بتجيب نسوان يا عصام |
| It will be a disaster if you're bringing women (here) Isaam.
(ابن القنصل) |
Example 3
دي مصيبة يا هادي لـيكونوا قصوا القماش ولا بوّظوه |
| Haadi, this will be a disaster if they cut the fabric or destroyed it.
(هبة رجل الغراب) |