30:17
STRUCTURE
2380 Views
01:56
READING COMPREHENSION &VOCABULARY
1320 Views
01:52
The Form of Irregular Verbs
1329 Views
01:59
The Tense of the Passive Voice
1406 Views
09:31
Changing from Active into Passive
1180 Views
07:20
The Form of the Passive Voice
1388 Views
03:29
What is the Passive Voice?
1431 Views
03:45
The Form of the Active Voice
1387 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1801 Views
03:20
Since vs For
1533 Views
04:50
Have or Has
1348 Views
00:49
Key Words: Present Perfect
3180 Views
09:03
The Use of the Present Perfect
1341 Views
03:08
Meaning and Form
1384 Views
02:40
Writing Formal Letters
1375 Views
03:10
Language Use
1970 Views
09:35
Parallel Structure
1522 Views
04:35
Prepositions of Instruments and Means
1355 Views
03:27
Polite Requests
1424 Views
06:30
May as a Modal of Permission and Request
1411 Views
04:11
Can as a Modal of Permission and Request
1238 Views
02:50
عناصر الاداء
1359 Views
03:45
شركة ستيرن
922 Views
01:15
مقياس القيمة المضافة
1160 Views
02:58
مقياس الربحية
1127 Views
02:39
معايير دركر
1276 Views
03:51
مقايس الاداء
1290 Views
01:41
اتخاذ اجراءات تصحيحية
991 Views
01:52
المرحلة الثانية من الرقابة
965 Views
02:49
مراحل الرقابة
2283 Views