30:17
STRUCTURE
2489 Views
01:56
READING COMPREHENSION &VOCABULARY
1393 Views
01:52
The Form of Irregular Verbs
1409 Views
01:59
The Tense of the Passive Voice
1506 Views
09:31
Changing from Active into Passive
1263 Views
07:20
The Form of the Passive Voice
1478 Views
03:29
What is the Passive Voice?
1512 Views
03:45
The Form of the Active Voice
1463 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1941 Views
03:20
Since vs For
1607 Views
04:50
Have or Has
1421 Views
00:49
Key Words: Present Perfect
3318 Views
09:03
The Use of the Present Perfect
1427 Views
03:08
Meaning and Form
1483 Views
02:40
Writing Formal Letters
1468 Views
03:10
Language Use
2049 Views
09:35
Parallel Structure
1624 Views
04:35
Prepositions of Instruments and Means
1436 Views
03:27
Polite Requests
1531 Views
06:30
May as a Modal of Permission and Request
1523 Views
04:11
Can as a Modal of Permission and Request
1332 Views
02:50
عناصر الاداء
1406 Views
03:45
شركة ستيرن
982 Views
01:15
مقياس القيمة المضافة
1271 Views
02:58
مقياس الربحية
1167 Views
02:39
معايير دركر
1338 Views
03:51
مقايس الاداء
1332 Views
01:41
اتخاذ اجراءات تصحيحية
1029 Views
01:52
المرحلة الثانية من الرقابة
1072 Views
02:49
مراحل الرقابة
2415 Views